Name: Combination Salad
Ingredients: 2 heads of lettuce washed; 1 cucumber; 3 tomatoes; 1 medium sized onion; 1 green pepper in small pieces

Why it works: Lettuce and cucumber match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,409 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Combination Salad

Ingredients

Directions

Prepare

Peel and slice one cucumber.
Peel and slice three tomatoes.
Slice thin one medium-sized onion.
Cut one green pepper into small pieces, removing all seeds.
Wash and drain two heads of lettuce.

Assemble and serve

Toss all vegetables with French dressing.
Keep everything cold, ensuring the lettuce stays crisp.

Nutrition, whole recipe (rough)

118Calories

4 gProtein

1 gFat

25 gCarbs

What these numbers assume: 5 portions

Ingredient	Portion assumed	kcal
Onion	1 medium (110g)	44
Bell Pepper	1 medium (119g)	31
Tomato	1 medium (123g)	22
Cucumber	1/2 cup sliced (52g)	16
Lettuce	1 cup shredded (36g)	5

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

By North End Club (Chicago, Ill.). Recipe from a historical cookbook (Internet Archive).

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. See the original page.

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.

Lettuce + cucumbertop 1% of all pairs

Smell alikestrong

Cooked together1,409 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Cucumber + tomatotop 4% of all pairs

Smell alikemoderate

Cooked together2,405 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Lettuce + tomatotop 6% of all pairs

Smell alikemoderate

Cooked together1,655 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Tomato + peppertop 7% of all pairs

Smell alikemoderate

Cooked together17,923 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Lettuce + oniontop 8% of all pairs

Smell alikestrong

Cooked together3,562 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

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

What each ingredient does

Lettuce: Forms the crisp base of the salad and provides its main body.
Tomatoes: Add juiciness and acidity that brighten the dressing.
Cucumber: Adds cool moisture and a crisp, refreshing texture.
Onion: Contributes sharp, pungent flavor that cuts through the dressing.
Green pepper: Adds crunch and a fresh, slightly bitter vegetal flavor.

The step that matters

Keep everything cold, ensuring the lettuce stays crisp.. Lettuce loses its crispness as its cells lose water and wilt when warm or left sitting. Chilling the vegetables and dressing the salad just before serving keeps the leaves firm and the texture pleasant.

Swap the onion

How well each one fits the dish's main ingredients (lettuce, cucumber, tomato, pepper):

Capsicumfits better
Spinachfits better
Eggplantfits better
Onionthe original

Fit is the average pairing score against lettuce, cucumber, tomato, pepper. 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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Combination Salad