Preheat oven to 325 degrees
Remove all packaging from the ham, including glaze packet, and place face down in a large roasting pan
Add 1/2 inch of water to the bottom of the pan, then cover the pan tightly with aluminum foil
Cook the ham for 14-16 minutes per pound, or until an internal temperature of 120 degrees. Total cook time will vary by weight
Remove the ham from the oven and allow to rest for about 10 minutes before serving or glazing, if desired
Massage the packet to gently blend the glaze. Cut one corner off the glaze packet and squeeze glaze evenly over the top of ham. If desired, use a knife or brush to spread glaze between slices. Allow glaze to melt into the ham before serving.