Heat oil in medium-size saucepan over medium heat. Add garlic and onion; cook for 8 minutes or until softened. Stir in vinegar, lemon juice, hot sauce, ketchup, mustard and cayenne. Simmer, covered, 15 minutes. Remove from heat; let stand 20 minutes or until cooled. Place meat in roasting pan. Brush both sides of meat with sauce, spooning any remaining sauce on top. Cover ;refrigerate overnight. To bake; heat oven to 350?. Bake meat, covered, for 2 hours. Reduce oven temperature to 250?; cook 6 hours or until fork tender. Slice meat against grain. Serve with bottled barbecue sauce (or your own favorite recipe) for dipping. Recipe by: Family Circle - 6/3/97 Posted to MC-Recipe Digest V1 #629 by The Taillons on May 31, 1997