Those attractive-looking, moist and juicy spiral hams have become a staple on the holiday dinner table. Spiral-cut hams are fully cooked, cured hams that are pre-sliced nearly all the way through so that the slices are easy to serve, but the ham stays intact for an attractive presentation. Smoked spiral hams come in a variety of wood flavors, such as hickory and mesquite. Because spiral hams are already pre-cooked and many come pre-glazed, you can serve them at room temperature. However, if you want to serve hot, smoky ham, you'll need to heat the ham in the oven on low heat.
Preheat your oven to 275 degrees Fahrenheit.
Place your spiral-smoked ham in a shallow roasting pan. If the ham is half- or quarter-sized, place the ham flat-side down. If you have a whole ham, lay it fat-side up in the pan.
Cover the pan with foil and place in the oven. Heat the ham for 10 to 15 minutes per pound.
Remove the ham from the oven and let it sit covered for 20 to 30 minutes before serving. To slice a bone-in ham, use a sharp knife to cut along the seam lines of the ham well as around the bone; the slices will lift easily with a fork. Slice a boneless ham through the seam lines on the outside to release the slices.