Preparation:

Step 1:

• Heat 2 tablespoons of vegetable oil in a large skillet over medium heat. Add the pork belly cubes in batches, ensuring not to overcrowd the pan. Sear each side until golden brown, about 3-4 minutes per side. Remove the pork and set aside.

Step 2:

• In the same skillet, add the remaining oil. Sauté the onions and garlic until fragrant and softened, about 2 minutes.

Step 3:

• Sprinkle the brown sugar over the onions and garlic. Stir continuously until the sugar melts and forms a caramel glaze, about 3-4 minutes.

Step 4:

• Add the soy sauce, fish sauce, and water to the caramel mixture. Stir until everything is well combined, then return the seared pork belly to the pan.

Step 5:

• Simmer the pork belly on low heat for 45 minutes to 1 hour, or until the pork is tender and the sauce has thickened. Stir occasionally to prevent burning.

Step 6:

• Add the rice vinegar and optional chili flakes for a slight tang and spice. Adjust seasoning with salt and pepper as needed.

Step 7:

• Just before serving, sprinkle sesame seeds over the caramelized pork belly and garnish with chopped green onions.