Cut the pork into big chunks and place them into a pressure cooker. Add a cup of water, salt to taste, and a star anise. Pressure cook for 20 to 25 minutes or until done. Slice it into 1/2-inch pieces.
Heat your wok over medium-high heat and swirl the oil around to coat the bottom and sides of the pan.
Add chopped ginger and garlic and stir fry for a few minutes on medium heat.
Next, add the pork slices and green chillies and cook for about 2-3 minutes until they are browned and cooked through.
Add the sauces and continue to stir fry for 1 to 2 minutes until the meat and the sauces are well combined.
In the same pan, add the chopped vegetables - onions, capsicum, and bell pepper Stir-fry the vegetables for about 3-4 minutes until they are tender-crisp.
Pour a tablespoon of vinegar and also add 1/2 tsp of crushed pepper over the pork and vegetables in the pan and toss well to coat everything evenly. Also, add chopped spring onion greens and stir for a few seconds.
Finally, add cornflour slurry and continue cooking for an additional 1-2 minutes until the sauce has thickened and coats the ingredients nicely.
Serve the pork stir fry (with vegetables) over steamed rice or noodles and enjoy!