Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and 34,122 recipes mention both. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Eggs with Tomato Sauce
Ingredients
Directions
Make the sauce
Fry the chopped onion in butter until soft.
Add tomatoes, flour, and parsley; stir well.
Pour in soup stock, and season with salt and cayenne; cook for 15 minutes.
Fry and serve
Fry the eggs in drippings until cooked on both sides.
Place the eggs in a shallow dish and pour the sauce over them.
Serve hot.
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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Parsley + peppertop 2% of all pairsAroma overlapstrongMentioned together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Tomato + peppertop 7% of all pairsAroma overlapmoderateMentioned together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + tomatotop 8% of all pairsAroma overlapmoderateMentioned together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + parsleytop 8% of all pairsAroma overlapmoderateMentioned together5,398 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Onion + parsleytop 9% of all pairsAroma overlapmoderateMentioned together25,843 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
- Eggs
- Form the main body of the dish and set firm when fried.
- Butter
- Fats the onion as it softens, adding richness and flavor to the sauce.
- Tomatoes
- Provide acidity and body to the sauce.
- Flour
- Thickens the sauce as it cooks with the tomatoes and stock.
- Soup stock
- Adds liquid and savory depth, loosening the sauce.
The step that matters
Cooking the sauce for 15 minutes. Simmering lets the flour fully cook and thicken the tomato and stock mixture, so the sauce coats the eggs instead of running thin and tasting raw.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (butter, tomato, flour, parsley, pepper, egg):
- Capsicumbetter flavor fit
- Shallotbetter flavor fit
- Chivebetter flavor fit
- Onionthe original
Fit is the average pairing score against butter, tomato, flour, parsley, pepper, 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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