Lasagna - cooking recipe

Ingredients

1 lb. hamburger
1/2 medium onion, chopped
2 c. spaghetti sauce
6 oz. lasagna noodles
1 egg, beaten
1 c. cottage cheese
2 c. Mozzarella cheese, grated
1/2 c. Parmesan cheese

Preparation

Brown hamburger and onions in skillet; drain.
Add spaghetti sauce and simmer for 20 minutes.