6 oz. thin spaghetti
1 lb. hamburger
1/2 c. onion
1/4 c. green pepper
1 lg. jar Prego Spaghetti Sauce
2 lg. pkg. shredded Mozzarella cheese
1 jar sliced mushrooms
Pepperoni slices
Parmesan cheese

Cook spaghetti according to package directions. Drain and add a large lump of butter. Set aside.

Brown hamburger with onion and green pepper. Drain off fat. Add half the Prego Sauce to hamburger. Add the other half of Prego to spaghetti.

In a greased, 9 x 13 inch oblong pan, pour in spaghetti. Sprinkle Parmesan cheese on top. Cover with 1 package of Mozzarella cheese. Top with hamburger mixture. Cover with drained mushrooms and pepperoni slices. Top with Parmesan cheese.

Bake at 350 degrees for 20 minutes. Sprinkle on other package of Mozzarella cheese and return to oven. Bake only until cheese melts. Let set for a few minutes before serving.