Why it works: Pepper and tomato 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
serves 10Ingredients
Directions
Roast the vegetables
Preheat the oven to 230 °C (450 °F). Roast bell peppers on a foil-lined baking sheet for 30 to 40 minutes, until peppers are soft and skins begin to blacken. Once cooled, remove seeds and stems, roughly chop, and reserve.
Mix tomatoes with olive oil and 2 mL (½ tsp) black pepper. Roast on a separate baking sheet in the oven for 25 to 30 minutes until they begin to brown.
Make the soup
In a large pot, heat vegetable oil over medium heat. Add onions and cook for 2 to 3 minutes, until softened. Stir in garlic and cook for 1 minute. Add oregano, salt, and the remaining 2 mL (½ tsp) pepper.
Add roasted tomatoes, roasted peppers, and broth. Cook uncovered for 20 minutes.
Remove from the stove and, using a hand blender, blend the soup in the pot until smooth.
Return to the stove and stir in beans. Cook until the beans are warmed and adjust consistency with water to suit your family's taste.
Steps grouped into stages for easier reading; the method is the source's own.
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.
-
Pepper + tomatotop 4% of all pairsAroma overlapstrongMentioned together17,913 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + olivetop 1% of all pairsAroma overlapstrongMentioned together14,164 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Onion + garlictop 1% of all pairsAroma overlapstrongMentioned together29,030 recipes
Shared aroma: furaneol (caramel, strawberry).
-
Tomato + oreganotop 2% of all pairsAroma overlapstrongMentioned together2,767 recipes
Shared aroma: 2-hexenal (green, leafy).
-
Tomato + garlictop 2% of all pairsAroma overlapmoderateMentioned together14,075 recipes
Shared aroma: furaneol (caramel, strawberry).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Red bell peppers
- Roasting softens them and concentrates their sweetness, adding body and flavour to the soup.
- Tomatoes
- Roasting browns their sugars and adds depth, while their juices add acidity and moisture.
- Onions
- Softened in oil, they build a sweet, savoury base for the soup.
- White kidney beans
- Their starch thickens the blended soup slightly and adds creamy body and protein.
The step that matters
Blending the soup until smooth. Blending must happen after the vegetables are fully cooked and softened; blending too early or unevenly leaves a grainy texture, and the hot liquid can splatter, so blend carefully.
Flavor stand-ins for the kidney beans
How well each one fits the dish's main ingredients (pepper, tomato, olive, onion, garlic, oregano):
- Beansbetter flavor fit
- Chickpeabetter flavor fit
- Black-eyed peabetter flavor fit
- Kidney beansthe original
Fit is the average pairing score against pepper, tomato, olive, onion, garlic, oregano. 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.
You might also like
Illustration
Illustration
Illustration
IllustrationThe Sunday pairing: one pairing, the chemistry behind it, and how to cook it. No spam, unsubscribe anytime.
Prefer an account? Create a free account for sign-in; Pro adds the full results and chemistry.