Billy Lewis is a 20-year-old man admitted to the hospital with the nephrotic syndrome. He is 5'11", weighs 192 pounds, and has edema. His blood values include albumin 1.7 g/dL, K 3.3 mEq/L, and LDL cholesterol 192 mg/dL. He is complaining of hunger and wants a snack. The most appropriate food choice is ____.