Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Boiled Leg of Mutton
Ingredients
Directions
Melt the butter and onion juice in a kettle over high heat.
Add the mutton and cook for 10 minutes, turning frequently.
Cover the mutton with hot water, then add the lemon slice, salt, and pepper. Cook for 2.5 hours.
Combine tomato juice, butter, flour, vinegar, salt, and pepper to make the sauce.
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.
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.
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Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Pepper + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Lemon + tomatotop 11% of all pairsSmell alikemoderateCooked together4,592 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mutton leg
- Is the main cut that becomes tender and flavorful during long simmering in water.
- Tomato juice
- Provides acidity and body to the sauce that accompanies the meat.
- Flour
- Thickens the sauce so it clings to the meat.
- Vinegar
- Adds sharpness that balances the richness of the mutton and tomato sauce.
The step that matters
Cook for 2.5 hours. Long, gentle cooking in water is needed to break down the tough connective tissue in mutton. Cooking too briefly leaves the meat chewy, while a rolling boil can toughen the muscle fibers and dry the surface.
Swap the lemon
How well each one fits the dish's main ingredients (butter, onion, mutton, pepper, tomato, flour, vinegar):
- Cherryfits about as well
- Limefits about as well
- Mangofits about as well
- Lemonthe original
Fit is the average pairing score against butter, onion, mutton, pepper, tomato, flour, vinegar. 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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