Why it works: Beef and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,092 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Meat Loaf for Lovers
Ingredients
Directions
Prepare
Preheat oven to 350°F.
Beat egg lightly in a large bowl, add beef, sausage, bread crumbs, onion, peppers and ¾ cup of the tomato sauce, then mix together.
Bake and serve
Form into a heart shape in an ungreased baking pan.
Bake uncovered for 60 minutes.
Spoon remaining tomato sauce over the top and bake an additional 15 minutes or until no longer pink in the center.
Let stand 1 minute and remove to serving platter.
Nutrition, whole recipe (rough)
What these numbers assume: 7 portions
| Ingredient | Portion assumed | kcal |
|---|---|---|
| Flour | 1 cup (125g) all-purpose | 455 |
| Beef | 100g cooked | 250 |
| Pork | 100g cooked | 242 |
| Egg | 1 large egg (50g) | 78 |
| Onion | 1 medium (110g) | 44 |
| Bell Pepper | 1 medium (119g) | 31 |
| Tomato | 1 medium (123g) | 22 |
One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.
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.
-
Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beef + tomatotop 8% of all pairsSmell alikemoderateCooked together5,448 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Bread + tomatotop 10% of all pairsSmell alikemoderateCooked together1,013 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Binds the meat and crumbs together so the loaf holds its shape when sliced.
- Bread crumbs
- Absorb juices and keep the loaf moist and tender rather than dense.
- Lean ground beef
- Provides the main meaty structure and protein that sets as the loaf cooks.
- Italian sausage
- Adds fat and seasoning, keeping the loaf juicier and more flavorful than beef alone.
- Tomato sauce
- Adds moisture and acidity, and its surface layer browns and glazes as it bakes.
The step that matters
Checking for doneness in the center. Ground meat mixtures can look cooked outside while the center is still pink. Cooking until no pink remains, with the center reaching a safe internal temperature, ensures the meat is fully cooked through.
Swap the onion
How well each one fits the dish's main ingredients (egg, beef, bread, tomato, sauce, pepper):
- Capsicumfits better
- Asparagusfits better
- Spinachfits about as well
- Onionthe original
Fit is the average pairing score against egg, beef, bread, tomato, sauce, 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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