Each ingredient’s weight is multiplied by its USDA FoodData Central values per 100 g. The whole recipe is added up and divided by 4. Raw weights are used for meat, fish and vegetables; beans and lentils are drained weights. All of the oil is counted as eaten. Added salt is not included; sodium from stock, bread, cheese and tinned food is.
Calculation, whole recipe| Ingredient | Weight used | Source | Energy | Protein |
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| lamb mince | 360 g | FDC 174370Lamb, ground, raw | 1015 kcal | 59.6 g |
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| dried breadcrumbs | 30 g | FDC 174928Bread, crumbs, dry, grated, plain | 119 kcal | 4.0 g |
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| eggs | 56 g | FDC 171287Egg, whole, raw, fresh | 80 kcal | 7.0 g |
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| dried oregano | 2 g | FDC 171328Spices, oregano, dried | 5 kcal | 0.2 g |
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| fresh mint | 10 g | FDC 173475Spearmint, freshFresh mint is 44 kcal per 100 g on FoodData Central 173475, so the few grams a recipe uses add 2 kcal at most. That record has no sugars value, so the mint is listed here rather than counted, which keeps the recipe's sugars calculable. | · | · |
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| garlic | 15 g | FDC 169230Garlic, raw | 22 kcal | 1.0 g |
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| olive oil | 4.5 g | FDC 171413Oil, olive, salad or cooking | 40 kcal | 0.0 g |
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| onion | 120 g | FDC 170000Onions, raw | 48 kcal | 1.3 g |
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| passata | 400 g | FDC 170460Tomato products, canned, puree, without salt addedCalculated with FoodData Central's unsalted tinned tomato purée record, the closest match to sieved passata. | 152 kcal | 6.6 g |
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| butter beans | 480 g | FDC 175204Beans, white, mature seeds, cannedFoodData Central has no record for tinned butter beans, which are mature lima beans. Calculated as tinned white beans, the closest tinned bean it records; the two are close in energy and protein, but your tin's label is the exact figure. | 547 kcal | 34.8 g |
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| spinach | 200 g | FDC 168462Spinach, raw | 46 kcal | 5.7 g |
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| feta | 50 g | FDC 173420Cheese, feta | 133 kcal | 7.1 g |
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| Whole recipe | | Divided by 4 | 2207 kcal | 127.4 g |
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Per serving the energy is rounded to the nearest 5 kcal, grams to the nearest whole gram and sodium to the nearest 10 mg. Ingredients marked “Not calculated” are excluded and could add at most 3 kcal to the whole recipe. Calculation method 1.0, September 2026. How the calculation works.