Spaghetti Casserole

Ingredients

• 1 lb. ground beef
• 1/3 c. chopped onion
• 1 (16 oz.) can stewed tomatoes
• 1 (12 oz.) can tomato paste
• 1 (4 oz.) can mushrooms stems and pieces, drained
• 2 tsp. salt
• 1 tsp. each: sugar, oregano and basil leaves
• 1/2 tsp. garlic powder
• 1/4 tsp. black pepper
• 7 oz. thin spaghetti
• 2 Tbsp. margarine
• 1/4 c. Parmesan cheese (optional)
• 8 oz. shredded Mozzarella cheese