Preparation Pat pork dry and season with salt and pepper. In a 4-quart heavy kettle heat oil over moderately high heat until hot but not smoking and brown pork on all sides, about 5 minutes total. Carefully add milk and cook pork, covered, at a bare simmer 2 hours. Continue to cook pork, partially covered, at a bare simmer until very tender, about 1 hour. Transfer pork to a cutting board and let stand 5 minutes. Season cooking liquid generously with salt and pepper and boil until slightly thickened, about 2 minutes. Thinly slice pork and transfer to a platter. Skim fat from cooking liquid and spoon liquid over pork.