Baked Spaghetti

Ingredients

• 1 cup chopped onion
• 1 cup chopped green pepper
• 1 Tbsp. butter or margarine
• 1 can (28 ounces) diced tomatoes with liquid
• 1 can (4 ounces) mushroom stems, drained
• 1 can (2 1/4 ounces) sliced ripe olive, drained
• 2 Tbsp. dried oregano
• 1 pound ground beef, browned and drained (optional)
• 2 cups (8 ounces) shredded cheddar cheese
• 1 can (10 3/4 ounces) condensed Cream of Mushroom soup diluted with 1/4 cups water
• 1/4 cup grated parmesan cheese