01 - Preheat your oven to 325°F (165°C). Place the ham, flat side down, on a rack in a large roasting pan. Score the surface of the ham in a diamond pattern, making shallow cuts about 1/4 inch deep.
02 - Cover the 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, until the sugar dissolves and the glaze is smooth. Remove from heat.
04 - After the first hour, remove the foil from the ham. Brush half of the glaze over the surface of the ham.
05 - Continue baking the ham, uncovered, for another 45–60 minutes, basting every 15–20 minutes with the remaining glaze, until the ham is caramelized and heated through (internal temperature should reach 140°F / 60°C).
06 - Remove the ham from the oven and let it rest for 15 minutes before slicing. Serve warm.