Grind the pork and pork fat using a meat grinder. Add the onion, parsley, saltpeter and spices. Test the mixture by making a small patty and cooking it. Adjust seasonings if need be. Put the mixture through the meat grinder a second time. Stuff the sausage casing. When ready to cook, prick the sausages all over with a fork to prevent bursting. Fry in a little oil.
