1/4 cup Parmesan cheese
Arrange chicken in the bottom of slow cooker. Stir together soup, tomato paste, onion, garlic salt, garlic, oregano, and mushrooms. Spoon sauce over chicken. Cover and cook on LOW for 5-6 hours. For last 30 minutes, add cheeses on top and let melt. Serve with plain spaghetti and spoon sauce over the pasta. Makes 4 servings.