Why it works: Egg and bread match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and 22,584 recipes mention both. Both carry (e)-2-octenal, which smells fatty, green. The science ↓
The recipe
Ingredients
Contains: egg, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Make the mayonnaise
Melt the aspic jelly and dissolve the gelatine in it.
Strain the mixture.
Gradually stir the liquid mixture into the mayonnaise, which should be well-seasoned.
Prepare the toppings
Finely chop the whites of the hard-boiled eggs.
Rub the yolks through a wire sieve.
Season the egg whites with a little vinegar or lemon juice.
Assemble and serve
Cut rounds of bread about ⅛ inch thick.
Mask one side of each round with the prepared mayonnaise just before it sets.
Arrange the seasoned egg whites in a ring on the masked rounds, leaving the center for the yolks.
Garnish with sprigs of watercress or parsley and serve.
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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Egg + breadtop 6% of all pairsAroma overlapstrongMentioned together22,584 recipes
Shared aroma: (e)-2-octenal (fatty, green).
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Egg + watercresstop 12% of all pairsAroma overlapmoderateMentioned together582 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
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Watercress + breadtop 13% of all pairsAroma overlaplowMentioned together307 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mayonnaise
- Forms the creamy, rich base that coats the bread and carries the flavour.
- Aspic
- Sets into a clear jelly that firms the mayonnaise coating as it cools.
- Gelatine
- Gives the aspic extra setting strength so the mayonnaise layer holds its shape.
- Eggs
- Provide the main filling, with chopped whites for texture and sieved yolks for richness.
The step that matters
Mask the rounds just before the mayonnaise sets. Gelatine-based mixtures set as they cool. If the mayonnaise has already firmed, it will not spread into an even coat, and if it is too runny it will slide off the bread.
“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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