spaghetti bake

Ingredients

• 1/2-1 cup onion, chopped
• 1/2 cup green bell pepper, chopped (optional) *can use red bell pepper if preferred
• 1 tablespoon butter
• 1 can 28-oz. can whole tomatoes (with liquid) crushed up
• 1/2 -3/4 cup sauteed mushrooms in butter and drained well (can substitute jarred mushrooms if preferred)
• 1 can small can sliced black olives
• 2 teaspoons dried oregano
• 1 package ground beef, cooked and drained
• 12 ounces cooked spaghetti
• 2 cups sharp cheddar cheese, grated
• 1 can cream of mushroom soup
• 1/4 cup water
• 1/4 cup parmesan cheese (grated)