Lasagna - cooking recipe

Ingredients

9 lasagna noodles, cooked
1 1/2 lb. ground beef
1/2 onion, chopped
1 qt. jar spaghetti sauce
2 c. grated Cheddar cheese
2 c. grated Mozzarella cheese
few sprinkles Parmesan cheese

Preparation

Brown the ground beef. Add onion and spaghetti sauce. Simmer for 5 minutes.