Cut the pork belly into 1 to 1½ cubes.
With the lid off your pressure, add the oil and place the pressure cooker on medium heat, when hot, add the garlic and onion, sauté until tender.
Add the pork belly and remaining ingredients, except the rice, stir together.
Add the lid to the pressure cooker and lock in place, add the weight on the lid. Place on high heat until the weight (jiggler) starts venting and making some sound and moving a little. Reduce heat to low or medium low to just keep the jiggler venting and moving, set your timer for 20 minutes.
At 20 minutes, turn off the heat and carefully move the pressure cooker to an unused burner and allow the pressure to release naturally, about 15-20 minutes.
When you have indications of zero pressure inside the cooker, carefully remove the weight, then remove the lid.
Remove the pork belly to a serving bowl, and pour the liquid into another bowl.
Serve pork belly with hot cooked rice, and spoon over liquid from the pot, as desired. Enjoy.