2Cut the pork shoulder into large chunks. In a large pot, combine the pork shoulder, 50 grams of white onion, 10 grams of garlic, 5 grams of salt, and 1000 grams of water. Bring to a boil, then reduce heat and simmer for 90-120 minutes, or until the pork shoulder is very tender. Skim any foam that rises to the surface.