Why it works: Onion and bread are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 8,676 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Dutch Lunch Sandwich
Ingredients
Directions
Prepare
Cut very thin slices from the center of the onion and soak them in ice water for 1 hour.
Assemble
Dry the onion slices, dip them in French dressing, and place them on the black bread.
Top each slice with shredded smoked sturgeon or whitefish and dust lightly with paprika.
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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Onion + breadtop 15% of all pairsSmell alikemoderateCooked together8,676 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Bread + sturgeontop 17% of all pairsSmell alikelowCooked together94 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + sturgeontop 24% of all pairsSmell alikelowCooked together90 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- White onion
- Thin slices provide a crisp, mild, aromatic layer on the bread.
- French dressing
- Adds moisture, sweetness and acidity that flavour the onion slices.
- Black bread
- Serves as the base that holds the toppings.
- Smoked sturgeon or whitefish
- Provides the smoky, savoury fish flavour at the centre of the sandwich.
The step that matters
Drying the onion slices. Soaking in ice water makes onion slices crisp and milder, but excess water left on them would dilute the French dressing and make the black bread soggy. Drying them well lets the dressing cling and keeps the bread firm.
Swap the onion
How well each one fits the dish's main ingredients (bread, sturgeon):
- Shallotfits better
- Tomatofits about as well
- Cucumberfits about as well
- Onionthe original
Fit is the average pairing score against bread, sturgeon. 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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