Add the oil to the pot and set to saute.
When the oil is hot add the pork and roughly brown.
Season to taste and add the garlic, ginger, chili flakes, ketchup, apple cider vinegar and soy sauce.
Stir well to combine and then add the brown sugar, pineapple chunks/juice, onion and peppers
Put a tall trivet in the pot and add the prepared rice with the water in a suitable container.
Put the lid on the pot and set to high pressure for 10 minutes. Leave under pressure for a further 10 minutes and then do a quick release.
Remove the lid and the rice. Stir the sauce together. Set the pot to saute. Remove around 4 tbsp of liquid and add to the cornstarch in a small bowl. Mix well together and add back to the pot.
Cook for around 3 minutes to allow the sauce to thicken whilst stirring occasionally.
Serve with the rice, garnished with sesame seeds.