Place the pork chops in an ovenproof casserole. Mix the remaining ingredients, except sour cream, and pour over the chops. Marinate the chops 2 to 3 hours in the refrigerator. Bake the chops, uncovered, in the marinade in a preheated 160ºC . oven for 1 hour or until tender. Add more wine if necessary. Stir sour cream into pan juices and heat through but do not boil. Serve chops with sour-cream gravy and buttered noodles or dumplings.