Name: Mini Meatball Soup
Ingredients: 2 tablespoons extra-virgin olive oil, 2 turns of the pan in a slow stream; 2 carrots, peeled and chopped; 2 ribs celery, chopped; 1 medium onion, chopped; 2 bay leaves, fresh or dried; salt and freshly ground black pepper; 1 pound ground beef, pork and veal combined; 1 egg, beaten; 2 cloves garlic, minced; ½ cup grated parmigiano-reggiano or romano, a couple of handfuls; ½ cup plain bread crumbs, a couple of handfuls; ½ teaspoon freshly grated or ground nutmeg; 6 cups chicken stock or broth; 2 cups water; 1½ cups dried pasta, rings, broken fettuccine or ditalini; 1 pound triple washed fresh spinach, coarsely chopped

Why it works: Carrot and celery match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,173 recipes. Both carry myristicin, which smells spice, warm. 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.

Carrot + celerytop 1% of all pairs

Smell alikestrong

Cooked together10,173 recipes

Shared aroma: myristicin (spice, warm).
Beef + porktop 1% of all pairs

Smell alikestrong

Cooked together5,690 recipes

Shared aroma: 12-methyltridecanal (tallowy, beefy).
Celery + peppertop 5% of all pairs

Smell alikestrong

Cooked together16,012 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Carrot + peppertop 6% of all pairs

Smell alikestrong

Cooked together14,555 recipes

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

Smell alikemoderate

Cooked together21,601 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

Ground beef, pork and veal: Provides the savory body and tender texture of the meatballs.
Egg: Binds the meat mixture so the meatballs hold their shape in the broth.
Bread crumbs: Absorb moisture and keep the meatballs tender rather than dense.
Parmigiano-reggiano or romano: Adds salty, savory flavor and helps bind the meatballs.
Dried pasta: Adds starch and bulk, thickening the broth slightly as it cooks.
Fresh spinach: Adds color and leafy texture as it wilts into the hot soup.

The step that matters

Rolling and dropping the meatballs into a gently boiling pot. Meat mixture is soft and can break apart if the broth is too rough. Reducing the heat slightly keeps the balls intact while they set and firm up in the liquid.

Swap the onion

How well each one fits the dish's main ingredients (olive, carrot, celery, pepper, beef, pork, veal):

Tomatofits better
Capsicumfits better
Potatofits better
Onionthe original

Fit is the average pairing score against olive, carrot, celery, pepper, beef, pork, veal. 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
Flour	1 cup (125g) all-purpose	455
Beef	100g cooked	250
Pork	100g cooked	242
Pasta	1 cup cooked (140g)	220
Chicken	100g cooked	165
Olive Oil	1 tbsp (14g)	119
Egg	1 large egg (50g)	78
Onion	1 medium (110g)	44
Carrot	1 medium (61g)	25
Nutmeg	1 tsp ground (2.2g)	12
Spinach	1 cup raw (30g)	7
Celery	1 stalk (40g)	6
Black Pepper	1 tsp ground (2.3g)	6
Garlic	1 clove (3g)	4
Bay Leaf	1 leaf (0.6g)	2
Salt	1 tsp (6g)	0
Veal	not in our table	0
Water	not in our table	0

Mini Meatball Soup