01 - Preheat oven to 325°F. Place ham flat side down on a rack in a large roasting pan. Score the surface in a diamond pattern with shallow cuts about 1/4 inch deep.
02 - Cover ham loosely with aluminum foil and bake for 1 hour.
03 - In a small saucepan, combine brown sugar, Dijon mustard, whole-grain mustard, honey, apple cider vinegar, and ground cloves. Heat over medium heat, stirring constantly, until sugar dissolves and glaze is smooth. Remove from heat.
04 - Remove foil from ham. Brush half of the glaze evenly over the surface of the ham.
05 - Continue baking uncovered for 45–60 minutes, basting every 15–20 minutes with remaining glaze, until ham is caramelized and heated through to internal temperature of 140°F.
06 - Remove ham from oven and let rest for 15 minutes before slicing. Serve warm.