Name: Caviere on Toast
Ingredients: rounds or fingers of toast; caviar; 1 tablespoon lemon juice; 1 small onion

Why it works: Lemon and onion are a kitchen classic. They rank in the top 19% of all ingredient pairs, and cooks put them together in 15,646 recipes. Both carry decanal, which smells soap, orange peel. The science ↓

Caviere on Toast

Ingredients

rounds or fingers of toast
caviar
1 tablespoon lemon juice
1 small onion

Directions

Spread the toast with caviar mixed with lemon juice.
Chop the onion very finely.
Place a ring of chopped onion around the outer edge of the toast.

Recipe from a historical cookbook (Internet Archive).

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.

Lemon + oniontop 19% of all pairs

Smell alikemoderate

Cooked together15,646 recipes

Shared aroma: decanal (soap, orange peel).
Caviar + oniontop 25% of all pairs

Smell alikelow

Cooked together46 recipes

Shared aroma: 2,4-decadienal (seaweed).
Caviar + lemontop 30% of all pairs

Smell alikelow

Cooked together92 recipes

Shared aroma: trans-2-nonenal (cardboard, fatty).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Caviar: Provides the salty, briny flavour and the main visible garnish on the toast.
Lemon juice: Adds acidity that brightens the rich, salty flavour of the caviar.
Toast: Gives a crisp, neutral base that holds the topping without going soggy quickly.
Onion: Adds a sharp, pungent bite that contrasts with the richness of the caviar.