Preheat oven to 325°F (165°C). Place the ham in a large roasting pan, cut-side down.
In a small bowl, mix together brown sugar, Dijon mustard, honey, apple cider vinegar, cinnamon, cloves, nutmeg, and salt until well combined.
Brush half of the glaze mixture generously over the top of the ham, making sure to get into the grooves of the meat.
Cover the ham loosely with aluminum foil and bake for 2 hours, basting with pan juices every 30 minutes.
Remove foil and brush remaining glaze over the ham. Continue baking uncovered for an additional 30 minutes, or until internal temperature reaches 140°F (60°C).
Let the ham rest for 15–20 minutes before slicing. Serve warm with extra glaze on the side.
Notes
Perfect for holiday gatherings—slice thick and serve with the reserved glaze.