Name: Ratatouille I
Ingredients: 2 tablespoons olive oil; 1 medium dice eggplant; 3 cups tomato concasse; 3 cups medium dice zucchini; 2 cups medium dice onions; 2 cups medium dice, seeded green bell peppers; 1 tablespoon minced garlic; 2 tablespoons minced parsley

Why it works: Onion and garlic match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 29,058 recipes. Both carry furaneol, which smells caramel, strawberry. The science ↓

Ratatouille I

Time8–10 minutes

Ingredients

2 tablespoons olive oil
1 medium dice eggplant
3 cups tomato concasse
3 cups medium dice zucchini
2 cups medium dice onions
2 cups medium dice, seeded green bell peppers
1 tablespoon minced garlic
2 tablespoons minced parsley

Directions

Cook the vegetables

Heat the olive oil in a large skillet over a medium-moderate flame.
Add the remaining ingredients (except parsley).
Heat and stir for 8–10 minutes until softened, without browning.
Add parsley, mix well.

Serve

Arrange onto a serving platter.
Serve warm, with crostini to the side.

Nutrition, whole recipe (rough)

272Calories

5 gProtein

14 gFat

34 gCarbs

What these numbers assume: 8 portions

Ingredient	Portion assumed	kcal
Olive Oil	1 tbsp (14g)	119
Onion	1 medium (110g)	44
Eggplant	1 cup cubed (82g)	35
Green Bell Pepper	1 medium (119g)	31
Tomato	1 medium (123g)	22
Cucumber	1/2 cup sliced (52g)	16
Garlic	1 clove (3g)	4
Parsley	1 tbsp chopped fresh (3.8g)	1

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

Recipe from the Recipes Wiki (Fandom).

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 their aromas overlap, and how often cooks already put them together.

Onion + garlictop 1% of all pairs

Smell alikestrong

Cooked together29,058 recipes

Shared aroma: furaneol (caramel, strawberry).
Olive + tomatotop 1% of all pairs

Smell alikemoderate

Cooked together15,539 recipes

Shared aroma: 3-hexenal (apple, fruity).
Eggplant + garlictop 1% of all pairs

Smell alikestrong

Cooked together801 recipes

Shared aroma: coumarin (sweet, hay).
Pepper + parsleytop 2% of all pairs

Smell alikestrong

Cooked together34,122 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Olive + garlictop 2% of all pairs

Smell alikemoderate

Cooked together25,665 recipes

Shared aroma: linalool (floral, citrus).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Eggplant: Its flesh softens and absorbs the cooking juices, giving the stew a creamy, tender body.
Zucchini: Releases moisture as it cooks, helping form the stewed liquid and keeping the vegetables tender.
Onions: Soften and turn sweet as they cook, adding depth to the base of the dish.
Tomato concasse: Provides acidity and liquid that combine with the vegetables into a sauce.
Olive oil: Carries flavour and helps the vegetables soften evenly in the skillet.

The step that matters

Heat and stir for 8–10 minutes without browning. Keeping the heat moderate and stirring often lets the vegetables soften and release moisture gently. Browning would change the flavour and texture, turning the sauce more caramelised than the fresh, stewed style of ratatouille.

Swap the onion

How well each one fits the dish's main ingredients (olive, eggplant, tomato, pepper, garlic, parsley):

Capsicumfits better
Okrafits better
Spinachfits better
Onionthe original

Fit is the average pairing score against olive, eggplant, tomato, pepper, garlic, parsley. 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.