- 1 (18-pound) whole bone-in, skin on, fully cooked, poached in cider with peppercorns, allspice, onion, carrot. (cook the day before) You can cook on the morning of Christmas Eve, but it takes 3 hours to simmer so allow enough time.
For the glaze:
- 1/2 cup cider vinegar
- 1 cup maple syrup
- 2/3 cup country-style Dijon mustard
- 2 tablespoons apricot jam
- Pinch of coarse salt
- Freshly ground black pepper
- Preheat oven to 180 degrees.
- Meanwhile, in a small saucepan, heat vinegar over medium-high heat until reduced to 2 tablespoons, about 6 minutes. Add maple syrup, mustard, jam, and salt; season with pepper. Cook, whisking, until well combined, about 2 minutes. Set glaze aside.
- Cut rind off ham using a sharp knife. Slice off most of the fat, leaving a 1/4-inch-thick layer. Score fat on top of ham in a pattern of 1- to 2-inch diamonds.
- Brush ham evenly with one-third of the glaze and put in oven. After 20 minutes, brush ham again with half the remaining glaze. Cook for 15 minutes and brush with remaining glaze. Continue baking ham until an instant-read thermometer inserted into thickest part of ham reaches 145 to 150 degrees, about 15 minutes more.
- Transfer to a cutting board. Let ham cool 30 minutes before carving.