Pat it dry thoroughly with paper towels or a clean kitchen towel.
Score the fat layer in a crosshatch pattern, cutting about 1/2 inch into the meat.
Place the ham fat-side up on a rack in a roasting pan and let it sit uncovered in the refrigerator overnight. This dries out the exterior and results in crispy skin.
When you’re ready to cook, preheat the oven to 325 °F (160 °C).
Put the ham in the preheated oven and roast until the internal temperature reaches 140 °F (60 °C). For a two-pound ham, it takes about one hour and fifteen minutes.
While the ham’s cooking, baste it every 30 minutes with the rendered fat and juices from the roasting pan. The ham is done when the fat is browned and crisp and the meat is tender.