Why it works: Fish and lemon are a kitchen classic. They rank in the top 6% of all ingredient pairs, and 1,855 recipes mention both. Both carry 2-nonenal, which smells fatty, green. The science ↓
The recipe
Ingredients
Contains: fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare
Clean the fish thoroughly and rub a little salt over the thick part and inside of the fish 1-2 hours before cooking.
Place the fish in a fish kettle and cover it with cold water.
Cook
Avoid pouring water directly on the fish to prevent breaking it.
Keep the water just simmering.
If the water boils away, add more by pouring it in at the side of the kettle, not on the fish.
Add salt in the specified proportion.
Gradually bring the mixture to a boil.
Skim carefully.
Draw the fish to the side of the fire and let it gently simmer until done.
Serve
Remove the fish and drain it.
Serve on a hot napkin and garnish with cut lemon and horseradish.
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 aroma chemistry they share, and how many recipes mention both.
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Fish + lemontop 6% of all pairsAroma overlapmoderateMentioned together1,855 recipes
Shared aroma: 2-nonenal (fatty, green).
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Lemon + horseradishtop 8% of all pairsAroma overlapmoderateMentioned together1,155 recipes
Shared aroma: coumarin (sweet, hay).
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Fish + horseradishtop 8% of all pairsAroma overlaplowMentioned together178 recipes
Shared aroma: acetaldehyde (pungent, ethereal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fish
- Its firm flesh is the main component, cooked gently so it stays intact and moist.
- Coarse sea salt
- Seasons the water and the fish, and is central to the bay-salt method of this dish.
The step that matters
Keep the water just simmering. Boiling vigorously can break up the delicate fish and make the flesh tough and ragged. Gentle heat cooks the fish evenly while keeping it whole.
Flavor stand-ins for the horseradish
How well each one fits the dish's main ingredients (fish, lemon):
- Asparagusbetter flavor fit
- Tomatobetter flavor fit
- Potatobetter flavor fit
- Horseradishthe original
Fit is the average pairing score against fish, lemon. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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