Why it works: Tomato and pepper are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Stewed Tomatoes with Onion
Ingredients
Directions
Prepare
Loosen the tomato skins with boiling water, then peel and slice the tomatoes.
Stew
In a saucepan, combine the sliced tomatoes, sliced onion, butter, pepper, salt, and sugar.
Stew gently for 30 minutes.
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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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Form the body of the dish and release juices that become the stewing liquid.
- Onion
- Adds savory depth and aroma as it softens in the tomato juices.
- Butter
- Adds fat for richness and a smooth, rounded mouthfeel.
- Sugar
- Balances the acidity of the tomatoes and rounds out their flavor.
The step that matters
Stew gently for 30 minutes. Gentle heat lets the tomatoes break down and thicken slowly without scorching on the bottom of the pan. A hard boil can scorch the sugars and leave the texture watery and uneven.
Swap the onion
How well each one fits the dish's main ingredients (tomato, butter, pepper, sugar):
- Capsicumfits better
- Potatofits better
- Carrotfits better
- Onionthe original
Fit is the average pairing score against tomato, butter, pepper, sugar. 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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