Preheat the oven to 150°C/300°F.
Heat a large frying pan over medium-high heat and add vegetable oil. Sauté pork for about 3 minutes until the pork is no longer pink and starting to brown.
In a medium bowl, mix the rest of the ingredients. Pour over the pork and bring to a boil. It may look a lot of water, but it will reduce.
Once mixture has boiled, transfer all to an ovenproof dish and cook for 2 hours or until very tender.
Garnish with spring onions. Serve over noodles or steamed rice.
