Place frozen ham in refrigerator for 26-28 hours. Remove from refrigerator and serve or cook as directed. This ham is fully cooked and can be eaten without reheating.
Roaster Method: To serve hot. Remove ham from packaging. Place ham on a roasting rack in a roaster cut side down. Pour water in the bottom of the roaster until water is within 1/4 inch of the base of the ham. Put cover on roaster and cook at 275°F for 18-20 minutes per pound or until internal temperature reaches 140°F.
Oven Method: Preheat oven to 275°F. Remove ham from packaging and place cut side down in a roasting pan on a roasting rack. Pour water in bottom of pan until water is within 1/4 inch of the base of the ham. Cover ham with a piece of parchment paper and cover with foil. Place ham in oven on middle rack. Bake for 2 1/2-3 hours until ham reaches internal temperature of 140°F.