While the ham is in the oven, prepare the glaze. In a small saucepan, combine the granulated sugar, brown sugar, honey, mustard, cinnamon, nutmeg, cloves, and apple cider vinegar. Cook over medium heat, stirring constantly, until the mixture is smooth and begins to bubble. Let it simmer for 2 to 3 minutes, until slightly thickened and shiny.
Once the ham is warmed through, remove it from the oven and increase the temperature to 425°F. Brush half of the glaze generously over the ham, making sure it gets down between the slices. Return the ham to the oven uncovered and bake for 10 minutes, until the glaze caramelizes.
For that classic Honey Baked–style crunch, brush the ham with the remaining glaze and switch the oven to broil. Broil for 2 minutes, keeping a close eye on it so the sugar doesn’t burn. For extra caramelization, sprinkle a bit of additional brown sugar over the top before broiling.
Remove the ham from the oven and allow it to rest for 5 minutes. Serve and enjoy!