Boil the pork belly in a pot with water, lemongrass, onion, garlic, salt, pepper, and pork fat.
Then cover and cook for 1 hour.
When it's boiling put in medium heat and boil until the pork gets soft.
When the pork is soft remove from the water and let it dry before frying.
Heat the oil and fry the pork until golden brown.
Serve with your favorite sauce.