Pineapple Pork with vinegar

1/2 cup plum sauce 1/3 cup pineapple juice 2 tablespoons fresh ginger , grated or 1 teaspoon ground ginger 2 tablespoons rice vinegar or 2 tablespoons cider[...]

2 lbs pork spareribs or 2 lbs back ribs, cut into serving pieces 1/2 cup ketchup 2 tablespoons brown sugar 1/4 cup vinegar 2 tablespoons Worcestershire sauce[...]