Preheat the oven to 350 degrees F.
Line a 7-inch pudding basin with most of the bacon rasher, reserving a few for the top. Put in a layer of pork, then stuffing, season with salt, pepper and mace. Continue this layering process until the basin is full, finishing with the reserved bacon. Press down well, then cover tightly. Stand the basin in a baking pan to catch drips. Bake the oven for 1 hour. Place a weighted board over the pudding and leave until completely cold. Turn out the mitton and slice to serve.