Why it works: Tomato and celery are a kitchen classic. They rank in the top 4% of all ingredient pairs, and cooks put them together in 3,377 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Vegetarian Lasagna
Ingredients
Directions
Make the sauce
Substitute ½ teaspoon dried oregano for ½ teaspoon dried basil.
Cut up canned tomatoes for the sauce.
In a large saucepan, stir together undrained tomatoes, tomato sauce, celery, green or sweet red pepper, basil, bay leaves, and garlic.
Bring to a boil; reduce heat.
Simmer uncovered for 20–25 minutes or until sauce is thick, stirring occasionally.
Remove bay leaves.
Prepare the filling
Cook noodles and broccoli separately according to package directions; drain well. Set aside.
Meanwhile, in a bowl, stir together egg, ricotta cheese, parmesan cheese, and ¼ teaspoon pepper.
Stir in broccoli.
Assemble and bake
Spread about ½ cup of sauce in a 13×9×2‑inch baking dish.
Top with half the noodles, half of the broccoli mixture, and half of the remaining sauce.
Repeat layers, ending with sauce.
Bake uncovered at 350 °F for 25 minutes; sprinkle with mozzarella.
Bake 5 minutes more or until heated through.
Let stand 10 minutes before serving.
Nutrition, whole recipe (rough)
Counts 12 of 13 ingredients. The other 1 aren't in our nutrition table and add nothing above, so the real totals are higher.
What these numbers assume: 12 portions
| Ingredient | Portion assumed | kcal |
|---|---|---|
| Ricotta Cheese | 1/2 cup (124g) part-skim | 174 |
| Parmesan Cheese | 1 oz (28g) | 110 |
| Mozzarella Cheese | 1 oz (28g) | 85 |
| Egg | 1 large egg (50g) | 78 |
| Broccoli | 1 cup chopped (156g) | 55 |
| Onion | 1 medium (110g) | 44 |
| Tomato | 1 medium (123g) | 22 |
| Chili | 1 tsp (2.7g) | 8 |
| Celery | 1 stalk (40g) | 6 |
| Garlic | 1 clove (3g) | 4 |
| Bay Leaf | 1 leaf (0.6g) | 2 |
| Basil | 5 leaves fresh (2.5g) | 1 |
| Lasagna | not in our table | 0 |
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.
-
Tomato + celerytop 4% of all pairsSmell alikemoderateCooked together3,377 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Celery + broccolitop 6% of all pairsSmell alikestrongCooked together807 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Broccoli + oniontop 6% of all pairsSmell alikestrongCooked together3,294 recipes
Shared aroma: coumarin (sweet, hay).
-
Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Lasagna noodles
- Form the layered structure that holds the sauce and filling together.
- Tomato sauce
- Provides moisture and body, thickening as it simmers into a rich base.
- Ricotta cheese
- Gives the filling a creamy, moist texture that sets lightly when baked.
- Egg
- Binds the ricotta and parmesan mixture so it holds its shape when baked.
- Mozzarella cheese
- Melts over the top to create a stretchy, lightly browned finish.
- Broccoli
- Adds bulk and texture to the filling layer.
The step that matters
Simmer the sauce until thick. Watery sauce will thin the layers and make the lasagna soggy, so the sauce should reduce and thicken on the stove before assembly.
Swap the onion
How well each one fits the dish's main ingredients (tomato, celery, pepper, egg, parmesan cheese, broccoli, sauce):
- Capsicumfits better
- Spinachfits better
- Mustardfits better
- Onionthe original
Fit is the average pairing score against tomato, celery, pepper, egg, parmesan cheese, broccoli, sauce. 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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