Ground Beef Casserole Ingredients: 1 lb ground beef 1 medium onion, finely chopped 1 green bell pepper, diced 1 red bell pepper, diced 2 cups shredded cheddar cheese (divided) 1 cup shredded mozzarella cheese 1 can (10.5 oz) cream of mushroom soup 1/2 cup sour cream 1/2 teaspoon garlic powder 1/2 teaspoon onion powder 1/2 teaspoon salt 1/4 teaspoon black pepper 3 cups cooked pasta or cooked rice (optional, depending on preference) 1 tablespoon olive oil or butter for sautéing Instructions: Prehe