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 ↓
Curried Lentils
Ingredients
Directions
Prepare
Soak the lentils in water for 3 to 4 hours, then drain them.
Make the curry
Put the lentils in a saucepan with butter and sliced onion.
Cook until the onion is nicely browned.
Add the lentils and boiling water.
Simmer for 1 hour.
Stir in lemon juice, curry powder, salt, and pepper.
Cook for an additional 10 minutes.
Serve
Serve with boiled rice.
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).
-
Lentils + oniontop 8% of all pairsSmell alikestrongCooked together1,221 recipes
Shared aroma: coumarin (sweet, hay).
-
Lentils + lemontop 11% of all pairsSmell alikestrongCooked together249 recipes
Shared aroma: coumarin (sweet, hay).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Lentils + peppertop 13% of all pairsSmell alikemoderateCooked together812 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Red lentils
- Form the main body of the dish, softening and thickening as they cook.
- Butter
- Adds fat and richness, and helps the onion brown.
- Onion
- Browns in the fat to add sweetness and savoury depth.
- Curry powder
- Provides the main spiced aroma and flavour.
- Lemon juice
- Adds acidity that brightens the flavour of the spices and lentils.
The step that matters
Cook the onion until nicely browned. Browning the onion in butter develops sweet, savoury flavours through the Maillard reaction. Pale onion leaves the finished dish flat and less rich.
Swap the lentils
How well each one fits the dish's main ingredients (butter, onion, lemon, pepper):
- Chickpeafits better
- Sesamefits better
- Black-eyed peafits better
- Lentilsthe original
Fit is the average pairing score against butter, onion, lemon, pepper. 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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