Pizza Casserole

Ingredients

• 1 lb. ground beef
• 1 medium onion, chopped
• 1 medium bell pepper, chopped
• 1 tsp. garlic salt
• 1/4 tsp. oregano
• 1 pkg. curly macaroni (3 c. uncooked or 12 oz. pkg.)
• 3 (8 oz.) cans tomato sauce
• 1 (4 1/2 oz.) can sliced mushrooms, drained
• 1 (3 1/2 oz.) pkg. dried pepperoni
• 1/2 lb. Mozzarella cheese, grated
• grated Parmesan cheese