Why it works: Tomato and lemon are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 4,592 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓
Tomato Preserve
Ingredients
Directions
Prepare the fruit
Peel the tomatoes by dipping them in boiling water.
Slice the tomatoes thick.
Drain the tomato juice.
Slice the lemons.
Boil the lemons in water until tender.
Drain the lemons.
Make the syrup
Combine the sugar and water in a pot to make a syrup.
Boil the syrup until thick.
Cook and jar
Add the tomatoes and lemons to the syrup gradually.
Cook until clear and rich.
Place the mixture on a flat dish to drain.
Transfer to jars and cover with syrup.
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.
-
Tomato + lemontop 11% of all pairsSmell alikemoderateCooked together4,592 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Sugar + tomatotop 33% of all pairsSmell alikelowCooked together4,667 recipes
Shared aroma: beta-damascenone (apple, rose).
Sugar and lemon barely smell alike, yet cooks put them together in 53,532 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Sugar
- Forms the thick syrup that preserves the fruit and gives it sweetness.
- Tomatoes
- Provide the main body of the preserve and its fruit flavor.
- Lemons
- Add acidity that balances the sweetness and brightens the flavor.
The step that matters
Cook until clear and rich. Sugar must be concentrated enough to preserve the fruit. Undercooking leaves the syrup thin and the preserve prone to spoiling, while overcooking can make it hard and sticky.
Swap the tomato
How well each one fits the dish's main ingredients (sugar, lemon):
- Arrowrootfits better
- Sweet potatofits better
- Kalefits better
- Tomatothe original
Fit is the average pairing score against sugar, lemon. 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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