Ziti Casserole With Ground Beef and Mushrooms Recipe | Say Mmm

Ingredients

• 16 ounces ziti or other large tubular pasta
• 1 tablespoon olive oil
• 1 pound lean ground beef
• 1 cup chopped onion
• 1 bell pepper, chopped
• 4 to 6 ounces sliced mushrooms
• 1 jar (25 ounces) spaghetti sauce
• 1 can (10 3/4 ounces) cream of mushroom soup
• 1 can (14.5 ounces) diced tomatoes
• salt and pepper, to taste
• 4 cups shredded mozzarella cheese or a combination of mozzarella and cheddar