Diabetic Exchanges: One tortilla (prepared with fat-free mayonnaise and sour cream and three strips of green pepper) equals 1-1/2 starch, 1 vegetable, 1 fat, 1/2 meat; also, 232 calories, 511 mg sodium, 12 mg cholesterol, 28 gm carbohydrate, 9 gm protein, 9 gm fat.