Poaching The GammonPlace the gammon in a container & completely cover with cold water. Cover & leave in the fridge overnight. The next day, roughly chop all of the vegetables & juice the oranges (keep the orange skins).
Place the soaked ham in a large pot & add the vegetables, oranges (juice & skins), garlic, herbs & all of the dry ingredients. Pour over the cider, topping up with cold water if necessary (the gammon needs to be completely covered in liquid). Place a lid on your pot.
Over a high heat, bring the gammon to a boil, lower the heat & allow to gently simmer until a food probe inserted into the gammon reads 60°c (skimming the stock when necessary). The ham should take around 1 hour to poach.
Once cooked, remove the ham from the cooking liquid & place on a metal rack that’s sat in a foil lined roasting tray. Leave to cool slightly whilst you make the glaze.
Preheat an oven to 190°c.
Making The GlazePlace all of the glaze ingredients (apart from the cloves) into a saucepan. Cook over a medium heat until the sugar has dissolved & the glaze has reduced roughly by half. Pass the glaze through a fine sieve before using.
Glazing The HamUsing a sharp knife, remove both the string & the skin from the ham, leaving a thick & even layer of fat. Lightly score the fat in a criss-cross pattern & stud each scored diamond with a clove. Brush the ham generously with glaze & roast in your preheated oven for 15 minutes.
Take the ham out of the oven & brush with more glaze.
Return to the oven & bake the ham for a further 30 minutes, brushing with glaze every 10 minutes.
Once the ham is cooked, leave it to rest in the tray for at least 20 minutes. Transfer to a chopping board & slice. Alternatively, the ham can be refrigerated as a whole joint then sliced & served cold.