{
  "status": "verified-estimate",
  "perServing": {
    "calories": 376,
    "protein": 27.2,
    "carbs": 22,
    "fat": 20,
    "sugar": 2.9
  },
  "servings": 4,
  "servingBasis": "1/4 of the complete recipe; 4 open-faced melts; 1 per serving; finished serving weight not measured",
  "ingredientSnapshot": [
    "360 g canned light tuna in water, drained solids",
    "160 g commercially prepared white bread, 4 slices of 40 g each",
    "50 g regular mayonnaise",
    "60 g celery, finely diced",
    "20 g scallion, finely sliced",
    "15 g fresh lemon juice",
    "10 g prepared yellow mustard",
    "100 g cheddar, grated",
    "0.5 g ground black pepper"
  ],
  "method": "Ingredient-sum estimate from retained primary USDA evidence and explicitly identified sugar supplements; canonical gram quantities divided by stated equal portions",
  "sources": [
    "https://fdc.nal.usda.gov/fdc-datasets/FoodData_Central_sr_legacy_food_csv_2018-04.zip",
    "https://fdc.nal.usda.gov/food-details/167747/nutrients",
    "https://fdc.nal.usda.gov/food-details/169988/nutrients",
    "https://fdc.nal.usda.gov/food-details/170005/nutrients",
    "https://fdc.nal.usda.gov/food-details/170931/nutrients",
    "https://fdc.nal.usda.gov/food-details/171009/nutrients",
    "https://fdc.nal.usda.gov/food-details/172234/nutrients",
    "https://fdc.nal.usda.gov/food-details/173414/nutrients",
    "https://fdc.nal.usda.gov/food-details/173709/nutrients",
    "https://fdc.nal.usda.gov/food-details/174924/nutrients"
  ],
  "notes": [
    "ESTIMATED per serving. Brand, crop, preparation, draining, pan residue and substitutions change actual nutrition. Not laboratory analysis.",
    "Each ingredient retains its primary food description and state. All listed ingredient masses are counted; cooking moisture changes do not change the stated portion count. No generic nutrient-retention factor is invented.",
    "Calories are kcal; protein, total carbohydrate, fat and total sugar are grams. Total carbohydrate includes fiber and is not net carbohydrate. Fiber and sodium are not displayed.",
    "Equal portions or explicitly counted items define the stated recipe yield. US/Metric display changes do not change these canonical inputs.",
    "Primary-source supplements are retained per ingredient where USDA lacks a field; missing values are never silently changed to zero.",
    "One quarter of the entire tuna mixture and cheese tops each 40 g slice. Brands differ in bread density, salt and mayonnaise formulation. Fish, wheat, egg and dairy are present."
  ],
  "ingredients": [
    {
      "sourceIndex": 0,
      "sourceText": "360 g canned light tuna in water, drained solids",
      "components": [
        {
          "ingredientKey": "tuna",
          "fdc_id": "173709",
          "foodDescription": "Fish, tuna, light, canned in water, drained solids (Includes foods for USDA's Food Distribution Program)",
          "foodState": "Fish, tuna, light, canned in water, drained solids (Includes foods for USDA's Food Distribution Program)",
          "quantity": 360,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Fish, tuna, light, canned in water, drained solids (Includes foods for USDA's Food Distribution Program). Canonical edible grams are recorded before recipe preparation.",
            "Canned light tuna in water weighed after draining; packing liquid is discarded before canonical weighing."
          ],
          "grams": 360,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 86,
            "protein": 19.44,
            "carbs": 0,
            "fat": 0.96,
            "sugar": 0
          },
          "contribution": {
            "calories": 309.6,
            "protein": 69.98400000000001,
            "carbs": 0,
            "fat": 3.4559999999999995,
            "sugar": 0
          },
          "status": "mapped",
          "retainedEvidence": {
            "sourceRecipeId": "tuna-egg-arugula-creamy-lemon-salad",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    },
    {
      "sourceIndex": 1,
      "sourceText": "160 g commercially prepared white bread, 4 slices of 40 g each",
      "components": [
        {
          "ingredientKey": "bread",
          "fdc_id": "174924",
          "foodDescription": "Bread, white, commercially prepared (includes soft bread crumbs)",
          "foodState": "Bread, white, commercially prepared (includes soft bread crumbs)",
          "quantity": 160,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Bread, white, commercially prepared (includes soft bread crumbs). Canonical edible grams are recorded before recipe preparation.",
            "Four 40 g slices of commercially prepared white bread; generic commercial white-bread profile, not a homemade bread assumption."
          ],
          "grams": 160,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 266,
            "protein": 8.85,
            "carbs": 49.42,
            "fat": 3.33,
            "sugar": 5.67
          },
          "contribution": {
            "calories": 425.6,
            "protein": 14.16,
            "carbs": 79.072,
            "fat": 5.327999999999999,
            "sugar": 9.072000000000001
          },
          "status": "mapped",
          "retainedEvidence": {
            "sourceRecipeId": "broccoli-feta-breakfast-strata",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    },
    {
      "sourceIndex": 2,
      "sourceText": "50 g regular mayonnaise",
      "components": [
        {
          "ingredientKey": "mayonnaise",
          "fdc_id": "171009",
          "foodDescription": "Salad dressing, mayonnaise, regular",
          "foodState": "Salad dressing, mayonnaise, regular",
          "quantity": 50,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Salad dressing, mayonnaise, regular. Canonical edible grams are recorded before recipe preparation.",
            "Regular mayonnaise is fully retained in the tuna filling."
          ],
          "grams": 50,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 680,
            "protein": 0.96,
            "carbs": 0.57,
            "fat": 74.85,
            "sugar": 0.57
          },
          "contribution": {
            "calories": 340,
            "protein": 0.48,
            "carbs": 0.285,
            "fat": 37.425,
            "sugar": 0.285
          },
          "status": "mapped",
          "retainedEvidence": {
            "sourceRecipeId": "shrimp-avocado-tacos-purple-slaw",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    },
    {
      "sourceIndex": 3,
      "sourceText": "60 g celery, finely diced",
      "components": [
        {
          "ingredientKey": "celery",
          "fdc_id": "169988",
          "foodDescription": "Celery, raw",
          "foodState": "Celery, raw",
          "quantity": 60,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Celery, raw. Canonical edible grams are recorded before recipe preparation."
          ],
          "grams": 60,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 14,
            "protein": 0.69,
            "carbs": 2.97,
            "fat": 0.17,
            "sugar": 1.34
          },
          "contribution": {
            "calories": 8.4,
            "protein": 0.414,
            "carbs": 1.7820000000000003,
            "fat": 0.10200000000000001,
            "sugar": 0.804
          },
          "status": "mapped",
          "sourceEvidence": {
            "file": "evidence/nutrition-usda-selected-evidence.json",
            "fdc_id": "169988",
            "dataset": "USDA FoodData Central SR Legacy, April 2018 final release",
            "nutrientRowIds": {
              "calories": "1485573",
              "protein": "1485668",
              "carbs": "1485620",
              "fat": "1485638",
              "sugar": "1485644"
            }
          },
          "retainedEvidence": {
            "sourceRecipeId": "roasted-eggplant-caponata",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    },
    {
      "sourceIndex": 4,
      "sourceText": "20 g scallion, finely sliced",
      "components": [
        {
          "ingredientKey": "scallion",
          "fdc_id": "170005",
          "foodDescription": "Onions, spring or scallions (includes tops and bulb), raw",
          "foodState": "Onions, spring or scallions (includes tops and bulb), raw",
          "quantity": 20,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Onions, spring or scallions (includes tops and bulb), raw. Canonical edible grams are recorded before recipe preparation."
          ],
          "grams": 20,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 32,
            "protein": 1.83,
            "carbs": 7.34,
            "fat": 0.19,
            "sugar": 2.33
          },
          "contribution": {
            "calories": 6.4,
            "protein": 0.366,
            "carbs": 1.4680000000000002,
            "fat": 0.038,
            "sugar": 0.466
          },
          "status": "mapped",
          "sourceEvidence": {
            "file": "evidence/usda-selected-oct8-evidence.json",
            "fdc_id": "170005",
            "dataset": "USDA FoodData Central SR Legacy, April 2018 final release",
            "nutrientRowIds": {
              "calories": "1487084",
              "protein": "1487114",
              "carbs": "1487141",
              "fat": "1487091",
              "sugar": "1487060"
            }
          },
          "retainedEvidence": {
            "sourceRecipeId": "chicken-cabbage-steamed-dumplings",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    },
    {
      "sourceIndex": 5,
      "sourceText": "15 g fresh lemon juice",
      "components": [
        {
          "ingredientKey": "lemon_juice",
          "fdc_id": "167747",
          "foodDescription": "Lemon juice, raw",
          "foodState": "Lemon juice, raw",
          "quantity": 15,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Lemon juice, raw. Canonical edible grams are recorded before recipe preparation."
          ],
          "grams": 15,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 22,
            "protein": 0.35,
            "carbs": 6.9,
            "fat": 0.24,
            "sugar": 2.52
          },
          "contribution": {
            "calories": 3.3,
            "protein": 0.0525,
            "carbs": 1.035,
            "fat": 0.036,
            "sugar": 0.37799999999999995
          },
          "status": "mapped",
          "sourceEvidence": {
            "file": "evidence/usda-selected-oct8-evidence.json",
            "fdc_id": "167747",
            "dataset": "USDA FoodData Central SR Legacy, April 2018 final release",
            "nutrientRowIds": {
              "calories": "1302093",
              "protein": "1302043",
              "carbs": "1302092",
              "fat": "1302091",
              "sugar": "1302087"
            }
          },
          "retainedEvidence": {
            "sourceRecipeId": "strawberry-lemon-granita",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    },
    {
      "sourceIndex": 6,
      "sourceText": "10 g prepared yellow mustard",
      "components": [
        {
          "ingredientKey": "mustard",
          "fdc_id": "172234",
          "foodDescription": "Mustard, prepared, yellow",
          "foodState": "Mustard, prepared, yellow",
          "quantity": 10,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Mustard, prepared, yellow. Canonical edible grams are recorded before recipe preparation."
          ],
          "grams": 10,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 60,
            "protein": 3.74,
            "carbs": 5.83,
            "fat": 3.34,
            "sugar": 0.92
          },
          "contribution": {
            "calories": 6,
            "protein": 0.37400000000000005,
            "carbs": 0.583,
            "fat": 0.33399999999999996,
            "sugar": 0.09200000000000001
          },
          "status": "mapped",
          "retainedEvidence": {
            "sourceRecipeId": "baked-onion-rings-mustard-yogurt",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    },
    {
      "sourceIndex": 7,
      "sourceText": "100 g cheddar, grated",
      "components": [
        {
          "ingredientKey": "cheddar",
          "fdc_id": "173414",
          "foodDescription": "Cheese, cheddar (Includes foods for USDA's Food Distribution Program)",
          "foodState": "Cheese, cheddar (Includes foods for USDA's Food Distribution Program)",
          "quantity": 100,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Cheese, cheddar (Includes foods for USDA's Food Distribution Program). Canonical edible grams are recorded before recipe preparation."
          ],
          "grams": 100,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 403,
            "protein": 22.87,
            "carbs": 3.37,
            "fat": 33.31,
            "sugar": 0.48
          },
          "contribution": {
            "calories": 403,
            "protein": 22.87,
            "carbs": 3.37,
            "fat": 33.31,
            "sugar": 0.48
          },
          "status": "mapped",
          "sourceEvidence": {
            "file": "evidence/nutrition-usda-selected-evidence.json",
            "fdc_id": "173414",
            "dataset": "USDA FoodData Central SR Legacy, April 2018 final release",
            "nutrientRowIds": {
              "calories": "1776804",
              "protein": "1776820",
              "carbs": "1776803",
              "fat": "1776863",
              "sugar": "1776864"
            }
          },
          "retainedEvidence": {
            "sourceRecipeId": "spinach-potato-frittata",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    },
    {
      "sourceIndex": 8,
      "sourceText": "0.5 g ground black pepper",
      "components": [
        {
          "ingredientKey": "black_pepper",
          "fdc_id": "170931",
          "foodDescription": "Spices, pepper, black",
          "foodState": "Spices, pepper, black",
          "quantity": 0.5,
          "unit": "g",
          "notes": [
            "Primary profile matches the recorded food state: Spices, pepper, black. Canonical edible grams are recorded before recipe preparation."
          ],
          "grams": 0.5,
          "conversion": {
            "type": "stated-weight",
            "basis": "Canonical edible ingredient mass in grams. No generic density or count conversion."
          },
          "per100g": {
            "calories": 251,
            "protein": 10.39,
            "carbs": 63.95,
            "fat": 3.26,
            "sugar": 0.64
          },
          "contribution": {
            "calories": 1.255,
            "protein": 0.05195,
            "carbs": 0.31975000000000003,
            "fat": 0.0163,
            "sugar": 0.0032
          },
          "status": "mapped",
          "sourceEvidence": {
            "file": "evidence/usda-selected-oct8-evidence.json",
            "fdc_id": "170931",
            "dataset": "USDA FoodData Central SR Legacy, April 2018 final release",
            "nutrientRowIds": {
              "calories": "1566555",
              "protein": "1566602",
              "carbs": "1566554",
              "fat": "1566540",
              "sugar": "1566544"
            }
          },
          "retainedEvidence": {
            "sourceRecipeId": "tomato-pea-spaghetti-frittata",
            "sourceDataset": "data/nutrition.json reconstructed from integrity-verified parts",
            "primaryFile": "data/evidence/nutrition-usda-selected-evidence.json"
          }
        }
      ]
    }
  ],
  "totals": {
    "calories": 1503.5550000000003,
    "protein": 108.75245000000001,
    "carbs": 87.91475,
    "fat": 80.0453,
    "sugar": 11.580200000000001
  },
  "missingNutrients": [],
  "reviewedAt": "2026-10-19"
}