01 - Preheat the oven to 325°F. Line a large roasting pan with aluminum foil.
02 - Place the ham flat side down in the prepared pan. Score the surface in a diamond pattern about 1/2 inch deep.
03 - In a small bowl, whisk together brown sugar, Dijon mustard, whole-grain mustard, apple cider vinegar, honey, and ground cloves until smooth.
04 - Brush half of the glaze over the ham, making sure to coat the scored cuts thoroughly.
05 - Loosely cover the ham with foil and bake for 1 hour and 15 minutes.
06 - Remove the foil and brush the remaining glaze onto the ham. Increase oven temperature to 400°F.
07 - Continue baking uncovered for 30 minutes, basting once halfway through, until the glaze caramelizes and the ham is heated through.
08 - Let the ham rest for 10 minutes before slicing. Garnish with chopped fresh parsley if desired.