1. Insert rotisserie rod through center of meat, place on rotisserie, and cook over coals that have burned down to red and glowing ash. If using a meat thermometer, angling it so tip is in center of meat but but not resting in fat or on rod, and roast to 170'F. If you have no thermometer, roast 3-1/2 to 4 hours, depending on size of roast.
2. Combine remaining ingredients and brush on roast frequently for last 30 minutes of cooking.