Trim all fat from pork chops and pound to slightly over 1/4 inch thick. (If you're using the very thick pork chops you might want to cut them in half crosswise.) Mix marinade ingredients. Put pork chops in zip-loc bag and pour marinade over. Marinate 6-8 hours or longer.
To cook, preheat grill to medium hot. To get those nice grill marks, rotate the pork chops after about 4 minutes on the first side. (I usually lift one up and check for the marks before I rotate them.) Cook about 8 minutes per side; total cooking time will depend on the temperature of your grill and the thickness of the pork chops. Pork chops should feel firm to the touch but not hard when they're done. Serve hot.