Nutrition Facts: Cheese-topped casserole: 1 cup equals 445 calories, 27 g fat (16 g saturated fat), 107 mg cholesterol, 753 mg sodium, 25 g carbohydrate, 1 g fiber, 26 g protein. Onion-topped casserole: 1 cup equals 410 calories, 24 g fat (11 g saturated fat), 70 mg cholesterol, 660 mg sodium, 30 g carbohydrate, 1 g fiber, 19 g protein.