Nutritional Analysis: One 1-1/2-cup serving (prepared with nonfat sour cream and fat-free mayonnaise) equals 353 calories, 500 mg sodium, 42 mg cholesterol, 51 gm carbohydrate, 21 gm protein, 5 gm fat. Diabetic Exchanges: 3 starch, 1-1/2 lean meat, 1 vegetable.