The term PREPARES, AS LEFTOVERS can be broken down into four crossword solutions: WARMS (5 letters), ZAPS (4 letters), REHEATS (7 letters), and HEATSUP (7 letters). Warming leftovers is a common way to prepare them for consumption. Zapping leftovers in the microwave is another way to heat them up quickly. Reheating leftovers is a process of heating them up again after they have been cooked and cooled. Heating up leftovers is a similar process to reheating, but it usually involves adding additional ingredients or flavors to the dish.