Pizza Casserole - cooking recipe

Ingredients

1 (4 oz.) pkg. pepperoni, sliced
1 medium onion, finely chopped
1/3 c. butter
6 oz. thin spaghetti, cooked
1 lb. Mozzarella cheese, thinly sliced
1 c. shredded Swiss cheese
2 (8 oz.) cans tomato sauce
1 (4 oz.) can mushrooms
1/2 tsp. oregano
1/2 tsp. basil

Preparation

Boil pepperoni 5 minutes to remove grease.
Drain.
Saute onion in 1 1/2 tablespoons butter until golden brown.
Place remaining butter in baking dish.
Toss spaghetti in butter.
Cover spaghetti with 1 can tomato sauce.
Add 1/2 of the Swiss cheese, 1/2 of the Mozzarella, all the mushrooms and onions.
Sprinkle with oregano and basil.
Top with remaining Swiss cheese and pepperoni.
Add second can tomato sauce and rest of Mozzarella cheese.
Bake 20 to 25 minutes.