Name: Thai Beef
Ingredients: 3/4 cup beef broth; 1/4 cup chunky peanut butter; 1 tablespoon soy sauce; 1 1/2 teaspoons lemon pepper; 1 pound beef sirloin, cut into 1/4-inch thick slices; 1 medium-size green bell pepper, cut into 1-inch pieces; 3 cups cooked rice; 2 eggs, beaten; 1 1/2 cups cottage cheese; 2 tablespoons grated Parmesan cheese; 2 cups grated Cheddar cheese, divided

Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

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.

Lemon + peppertop 3% of all pairs

Smell alikestrong

Cooked together27,047 recipes

Shared aroma: trans-2-nonenal (cardboard, fatty).
Peanut + ricetop 4% of all pairs

Smell alikestrong

Cooked together670 recipes

Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
Beef + peppertop 10% of all pairs

Smell alikemoderate

Cooked together18,971 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Beef + peanuttop 10% of all pairs

Smell alikemoderate

Cooked together174 recipes

Shared aroma: 2-methyl-3-(methyldithio)furan (thiamin, meat).
Beef + ricetop 10% of all pairs

Smell alikemoderate

Cooked together2,265 recipes

Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).

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

What each ingredient does

Beef sirloin: Provides the main protein, browning and chewy bite when seared quickly over high heat.
Chunky peanut butter: Adds nutty richness and body to the sauce, thickening it as it blends with the broth.
Beef broth: Forms the liquid base of the sauce, carrying the flavor and loosening the peanut butter.
Cooked rice: Adds bulk and soaks up the sauce, absorbing flavor as it heats through.
Green bell pepper: Contributes crisp-tender texture and fresh, slightly bitter vegetable flavor.

The step that matters

Cook the beef until no longer pink. Searing in a very hot skillet browns the surface and develops flavor, but overcrowding or low heat lets the meat steam and turn grey and tough. Cook only until no longer pink to avoid overcooking.

Swap the lemon

How well each one fits the dish's main ingredients (beef, peanut, butter, sauce, pepper, rice, egg):

Coconutfits better
Avocadofits about as well
Limefits about as well
Lemonthe original

Fit is the average pairing score against beef, peanut, butter, sauce, pepper, rice, egg. 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.

Ingredient	Portion assumed	kcal
Beef	100g cooked	250
Rice	1 cup cooked (158g) white	206
Peanut	1 oz (28g)	161
Cheddar Cheese	1 oz (28g)	113
Parmesan Cheese	1 oz (28g)	110
Cottage Cheese	1/2 cup (113g) 2%	98
Egg	1 large egg (50g)	78
Bell Pepper	1 medium (119g)	31
Lemon	juice of 1 lemon (48ml)	12
Soy Sauce	1 tbsp (15ml)	9
Black Pepper	1 tsp ground (2.3g)	6

Thai Beef

Thai Beef

Ingredients

Directions

Make the sauce

Cook the stir fry

Nutrition, whole recipe (rough)