2 packages (12 ounces each) breakfast sausage links 6 English muffins, cut into 1-inch cubes 1/4 cup butter, melted 1 cup (4 ounces) cheddar cheese, shredded 1 cup (4 ounces) mozzarella cheese, shredded 1/2 cup onion, chopped 1/2 cup red pepper, chopped 12 large eggs 2 cups milk 1/4 teaspoon salt Pepper to taste 1/4 cup bacon bits Cook sausage according to package . Cool slightly; cut into 1/4-inch pieces. In greased 13-by 9-inch baking dish, layer half the English muffin cubes and half the cooked sausage. Repeat layers. Drizzle with butter and top with cheese, onion and red pepper. In large bowl, combine eggs, milk, salt and pepper. Pour over casserole. Sprinkle with bacon. Cover and refrigerate overnight. Remove from refrigerator 30 minutes before baking. Uncover and bake at 350 for 45 to 50 minutes, or until knife inserted into center comes out clean. Let stand 5 minutes.