Thawing at room temperature can.

Heating ham slices. Place slices of ham in a baking pan and cover with aluminum foil. Remove all packaging materials and place ham face down directly into baking dish or roasting pan. (place whole ham on its side.) cover.

Follow instructions on the bag for preparation. If heating ham from the freezer, move it to the refrigerator to thaw 24 hours prior. After wrapping your ham, place it on a baking tray with the cut side down.

You want to heat your ham the same way you initially cooked it. Preheat the oven for about 10 minutes at 325 °f, and place the tray on the middle rack.