You could use tougher cuts of pork, or other cuts of meat, such as beef stew, but both of those would need to cook longer than the tenderloin. Tenderloin will be tender in about 20 minutes total, other, tougher cuts, might take up to an hour to get tender. If you decide on another cut of meat, be sure to cook it in the sauce until tender before adding the sweet potatoes and other ingredients.