Preheat oven to 325 degrees. Cut away any skin and trim the fat to a thickness of 1/4 to 1/2-inch. Place the ham, fat side up, in a shallow roasting pan lined with foil (since the sugar in the glaze can burn). As a rough guide, roast a fully cooked ham for about 10 minute per pound. A whole ham should cook in 2 1/2 to 3 hours, a half ham in 1 1/2 to 2 hours. Check the temperature after the minimum time with an instant-read meat thermometer. It should read 130 to 140 degrees. If not yet at the desired temperature, check it every 15 to 20 minutes. Serve the ham as is after a 20 to 30 minute rest or proceed to glaze it.
To glaze: when the ham is warmed through, raise oven temperature to 425 degrees. Remove the ham from the oven and score the surface of the fat to make a crisscross grid. Spread glaze generously over the surface of the ham. Bake about 20 minutes, basting with pan juices a few times. Remove the ham from the oven, cover loosely with foil, and let rest for 20 to 30 minutes before carving Serve with Vanilla Maple Sauce
Recipe Courtesy of The Complete Meat Cookbook