Why it works: Tomato and pepper match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and 17,913 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
The recipe
Ingredients
Contains: egg, tree nuts (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare the tomatoes
Scoop out the centers of the tomatoes.
Season the insides with coarse sea salt and black pepper.
Fill each tomato with a little mayonnaise sauce and a pickled walnut.
Make the aspic garnish
Chop the hard-boiled egg yolks and place them in a bowl.
Cover the yolks with aspic jelly.
Stir well.
Set the aspic in a half-inch sheet.
Serve
Arrange the stuffed tomatoes on a serving dish.
Garnish with small dice of the aspic.
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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Tomato + peppertop 4% of all pairsAroma overlapstrongMentioned together17,913 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + saucetop 7% of all pairsAroma overlaplowMentioned together5,468 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Tomato + walnuttop 8% of all pairsAroma overlapstrongMentioned together497 recipes
Shared aroma: 2-nonenal (fatty, green).
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Pepper + walnuttop 8% of all pairsAroma overlapstrongMentioned together3,035 recipes
Shared aroma: 2-nonenal (fatty, green).
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Walnut + eggtop 11% of all pairsAroma overlapstrongMentioned together5,912 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Hollowed shells that hold the filling and give the dish its fresh, juicy base.
- Mayonnaise sauce
- Adds richness and fat, moistening the filling inside each tomato.
- Pickled walnuts
- Add a tangy, sharp flavour that contrasts with the rich mayonnaise.
- Hard-boiled egg yolks
- Give a crumbly, rich texture to the garnish set in aspic.
- Aspic jelly
- Sets into a gelatin that holds the egg yolks together and forms a glossy garnish.
The step that matters
Set the aspic in a half-inch sheet. Aspic is a gelatin that only sets reliably when it is cool and at the right concentration. If it is too warm or too thin, it will not hold its shape, so the diced garnish will slump and lose its clean edges.
Flavor stand-ins for the walnut
How well each one fits the dish's main ingredients (tomato, pepper, sauce, egg):
- Beansbetter flavor fit
- Peasbetter flavor fit
- Chickpeabetter flavor fit
- Walnutthe original
Fit is the average pairing score against tomato, pepper, sauce, egg. 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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