Try these alternatives to the traditional pork pie. Instead of a pastry lid, use some sliced Stilton, or a layer of sage and onion stuffing. Or both - I've tried that and it is amazing. If you're not a blue cheese fan, ordinary cheese will work almost as well.
To glaze the pastry, an egg and a splash of milk. If you are using shop-bought stuffing mix, follow the instructions on the packet, but you'll probably need some boiling water plus a knob of butter to make up the stuffing.