Pizza Casserole - cooking recipe

Ingredients

1 (4 oz.) pkg. sliced pepperoni
1 (6 oz.) pkg. spaghetti
1/2 stick margarine
Parmesan cheese
1 medium onion, chopped
1 lb. lean ground beef
1 jar spaghetti sauce
1 (4 oz.) can sliced mushrooms
3 to 4 c. grated Mozzarella cheese

Preparation

Boil pepperoni for 5 minutes.
Drain.
Cook and drain spaghetti.
Add margarine and generous amount of Parmesan cheese to spaghetti.
Cook onion and ground beef; drain fat.
Add sauce and simmer about 15 minutes.
Add mushrooms.