Safety is of paramount importance when reheating any food, particularly proteins such as pork. It must reach an internal temperature of 73.9 degrees Celsius for safe consumption. Adding a small amount of water to the reheating dish will create steam that gently brings the pork to serving temperature and helps prevent overcooking. Reheat sliced pork only once; the longer pork is exposed to the temperature gradient between 4.44 degrees Celsius and 60 degrees Celsius the higher the probability of food-borne illness.
Preheat the oven to 163 degrees Celsius.
Arrange the pork slices in a baking dish in a single layer.
Pour 1 tbsp water in the baking dish and cover tightly with aluminium foil.
Reheat the sliced pork for 15 minutes, or, according to the U.S. Department of Agriculture, until "hot and steaming."