Sweet and sour pork leg vinegar. Dry fry thinly slice ginger then put in pork trotter blanch with hot water and continue frying until oil start to release from pork, add dark sweetened vinegar, rice vinegar and 2 whole washed garlic bulbs with skin one. Put on high until boiling, then low for 30-45 mins until fats and meat is tender. Best to eat after rested for few hours. Reheat to have warm feeling.