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 ↓
Cod Steaks with Tomato Puree
Ingredients
Directions
Poach the fish
Dry the fish with a cloth and sprinkle the undersides with salt, pepper, and lemon juice.
Place the fish on a buttered plate, cover with another plate, and set it over a saucepan of boiling water for 30 minutes until the fish leaves the bone.
Lift the fish onto a towel to drain, then place it on a hot serving dish.
Make the tomato puree
In a pan, warm the butter and fry the sliced tomatoes and onion.
Add the flour, seasonings, and a small cup of the fish liquid, and cook for 20 minutes.
Rub the mixture through a sieve, return it to the saucepan to heat, and pour it over the fish.
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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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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).
-
Tomato + lemontop 11% of all pairsSmell alikemoderateCooked together4,592 recipes
Shared aroma: 3-hexenal (apple, fruity).
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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
- Cod steaks
- Forms the main body of the dish, cooking gently to flake away from the bone.
- Tomatoes
- Provide moisture and acidity, and break down into the body of the puree.
- Butter
- Adds fat and richness, and helps the tomatoes and onion fry gently.
- Flour
- Thickens the puree so it coats the fish rather than running off.
- Onion
- Adds savoury aroma and mild sweetness as it softens in the butter.
The step that matters
Poaching the fish until it leaves the bone. Fish protein sets firmly once it is cooked through, so overcooking squeezes out moisture and leaves it dry and tough. Check at the stated time and remove it as soon as it parts from the bone.
Swap the mace
How well each one fits the dish's main ingredients (tomato, butter, flour, onion, pepper, lemon):
- Thymefits better
- Parsleyfits better
- Tarragonfits better
- Macethe original
Fit is the average pairing score against tomato, butter, flour, onion, pepper, lemon. 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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