Why it works: Ginger and lemon match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 5,154 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Tomato Preserve
Ingredients
Directions
Prepare the tomatoes
Wipe the tomatoes and cover them with boiling water. Let them stand until the skins can be easily removed.
Add the sugar to the tomatoes, cover, and let it stand overnight.
Make the syrup
In the morning, pour off the syrup.
Boil it until thick.
Skim off any foam.
Cook the preserve
Add the tomatoes, sliced ginger, and sliced lemons (seeds removed) to the syrup.
Cook until the tomatoes have a clarified appearance.
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.
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Ginger + lemontop 5% of all pairsSmell alikestrongCooked together5,154 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Pear + gingertop 7% of all pairsSmell alikemoderateCooked together452 recipes
Shared aroma: (e)-2-octenal (fatty, green).
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Tomato + gingertop 10% of all pairsSmell alikemoderateCooked together1,887 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + lemontop 11% of all pairsSmell alikemoderateCooked together4,592 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Pear + lemontop 13% of all pairsSmell alikemoderateCooked together942 recipes
Shared aroma: alpha-pinene (pine, turpentine).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Yellow pear tomatoes
- Provide the fruit that becomes the preserve, softening and turning translucent as they cook in syrup.
- Sugar
- Draws moisture out of the tomatoes and thickens the syrup, while preserving the fruit through its sweetness.
- Preserved canton ginger
- Adds spicy aroma and a sweet, warm flavour that contrasts with the tomatoes.
- Lemons
- Add acidity and brightness that balance the sweetness of the syrup.
The step that matters
Cook until the tomatoes have a clarified appearance. Cooking in thick sugar syrup must continue long enough for the tomatoes to turn translucent and the syrup to thicken. Stopping too early leaves a watery, cloudy preserve that may not keep well.
Swap the tomato
How well each one fits the dish's main ingredients (pear, sugar, ginger, lemon):
- Sweet potatofits better
- Carrotfits better
- Capsicumfits better
- Tomatothe original
Fit is the average pairing score against pear, sugar, ginger, 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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