Boil water with onion peel. Transfer the peel to a large, deep pot in which you will cook the knuckle. Pour in water and add salt. Put on the fire and bring to a boil. Add bay leaf and peppercorns to the pot.
Cook the pork knuckle in the husk. Place the pork knuckle in hot water. It is desirable that it is completely immersed in the liquid, as it will need to be turned over 1-2 times during the cooking process. Bring to a boil. Then cover the pan with a lid, make a small fire and cook the knuckle for 90 minutes.
Add garlic to the knuckle and finish cooking. Cool the finished knuckle in water. This is necessary so that the meat gets a darker color. Then remove and remove excess moisture with paper towels. Coat all sides with chopped garlic. Wrap in cling film and put in the refrigerator for 3-4 hours.