Put the ham on a baking tray or in a casserole - ready for the oven session.
Cover the ham generously w/ the glacing.
Let it rest until you'll need it for finishing (up to some hours or overnight). Don't put it in the fridge.
Let the ham heat up in the oven at 200°C for about 45 - 60 min.
Put it under the grill (220 - 240° C) for about 5 min & watch; stop the grilling when the ham starts burning (aka turning black).
Put the ham on a cutting board; remove the cloves with a pair of tweezers & cut into slices.