Grilled Chef's Prime Pork 1 2-4 pound boneless pork loin roast 3/4 cup chili sauce 1/4 cup cider vinegar 1 teaspoon dry mustard Grill over indirect coals. Mix chili sauce, vinegar and dry mustard as basting sauce. Grill roast for 45 minutes to 1 ½ hours brushing frequently with basting sauce, until meat thermometer reads 155 to 160°. Let stand for 5 minutes. Slice to serve.