Why it works: Lemon and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,037 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Stewed Fish
Ingredients
Directions
Prepare
Sprinkle salt on the fish pieces.
In a pot, boil ½ cup water with the sliced onion until cooked, then discard the water.
Cook the fish
Add 1 cup water, lemon juice, salt, pepper, and herbs to the pot.
Boil the fish in this mixture until done, about 20 minutes.
Thicken and serve
In a small bowl, rub together the butter and flour to a cream.
Thicken the gravy with the butter‑flour mixture and serve hot.
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 + parsleytop 1% of all pairsSmell alikestrongCooked together14,037 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
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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
- Fish
- Forms the main body of the dish, becoming tender as it simmers in the liquid.
- Onion
- Adds aromatic sweetness and savory flavor to the cooking water.
- Lemon juice
- Adds acidity that brightens the flavor of the stewed fish.
- Flour
- Thickens the cooking liquid into a gravy when cooked with butter.
- Butter
- Adds richness and fat, and combines with flour to form a smooth thickening paste.
The step that matters
Thicken the gravy with the butter‑flour mixture. Flour must be fully blended into the butter before being stirred into hot liquid; otherwise it clumps. Once added, the gravy should be kept at a simmer so the starch swells and thickens evenly.
Swap the onion
How well each one fits the dish's main ingredients (fish, lemon, pepper, parsley, butter, flour):
- Shallotfits better
- Carrotfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against fish, lemon, pepper, parsley, butter, flour. 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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