Why it works: Onion and tomato are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 20,633 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Boiled Leg of Mutton
Ingredients
Directions
Prepare
Put the leg of mutton in a kettle.
Add one tablespoonful of butter and one teaspoonful of onion juice.
Cook for ten minutes over a hot fire, turning frequently.
Cover with hot water.
Slice a lemon, add pepper and salt.
Cook and serve
Cook for two and a half hours.
Serve with one cupful of tomato juice, teaspoonful of butter, teaspoonful of flour, tablespoonful of vinegar, salt, and pepper.
Nutrition, whole recipe (rough)
What these numbers assume: 3 portions
| Ingredient | Portion assumed | kcal |
|---|---|---|
| Butter | 1 tbsp (14g) | 102 |
| Onion | 1 medium (110g) | 44 |
| Tomato | 1 medium (123g) | 22 |
One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures. See the original page.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
-
Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Butter + tomatotop 22% of all pairsSmell alikemoderateCooked together6,918 recipes
Shared aroma: 3-hexenal (apple, fruity).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mutton leg (in the method)
- Provides the main meat, which becomes tender through long, gentle simmering.
- Butter
- Adds fat and richness, carrying flavour through the cooking liquid.
- Onion juice
- Adds savoury, aromatic flavour to the meat.
- Tomato juice
- Adds acidity and a bright, tangy flavour to the serving sauce.
The step that matters
Cook for two and a half hours. Tough cuts of meat need long, low cooking so collagen breaks down into gelatin, making the meat tender. Cooking too briefly or at a hard boil leaves it chewy or dry.
Swap the tomato
How well each one fits the dish's main ingredients (butter, onion):
- Potatofits better
- Chivefits better
- Leekfits better
- Tomatothe original
Fit is the average pairing score against butter, onion. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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