Why it works: Pepper and lemon 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 ↓
Tripe, with Tomatoes and Spinach
Ingredients
Directions
Make the tomato base
Press the contents of the canned tomatoes through a colander into a saucepan.
Add salt and pepper after the pulp has boiled.
Squeeze in the lemon juice.
Add the chopped, scalded onion.
Boil for 10 minutes.
Thicken the mixture with flour and butter.
Cook and serve
Add the tripe and cook for about 15 minutes.
Serve with cooked spinach around the dish.
Top each bed of spinach with a poached egg.
Add fried bacon rolls in between.
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.
-
Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Lemon + spinachtop 6% of all pairsSmell alikestrongCooked together1,109 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
-
Pepper + spinachtop 6% of all pairsSmell alikemoderateCooked together3,400 recipes
Shared aroma: nonanal (fat, citrus).
-
Tomato + spinachtop 7% of all pairsSmell alikemoderateCooked together1,350 recipes
Shared aroma: trans-2-decenal (waxy, orange).
-
Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 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
- Tripe
- Forms the main body of the dish and becomes tender after simmering in the sauce.
- Canned tomatoes
- Provide the liquid base, acidity and fresh tomato flavour of the sauce.
- Flour
- Thickens the tomato liquid into a smoother, more cohesive sauce when cooked with butter.
- Butter
- Adds richness and helps make the flour thickening smooth and glossy.
- Spanish onion
- Adds savoury sweetness and aroma to the tomato sauce.
The step that matters
Thicken the mixture with flour and butter. Flour must be cooked into the butter and hot liquid to prevent lumps and a raw starchy taste. Stirring well while the sauce is at a simmer lets the starch swell evenly and thicken the sauce smoothly.
Swap the onion
How well each one fits the dish's main ingredients (tomato, pepper, lemon, flour, butter, spinach, egg):
- Okrafits better
- Asparagusfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against tomato, pepper, lemon, flour, butter, spinach, egg. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Tomato Soup526 recipes
Lemon Sauce236 recipes
Cream of Tomato Soup107 recipes
Tomato Bisque61 recipes