Dice potatoes, pork shoulder, and onion.
Heat cooking oil in a pan and stir-fry the pork shoulder.
Once the pork is cooked, add potatoes and onion and stir-fry together.
Season with salt and pepper.
Add 50ml of water, cover with lid, and simmer until potatoes are cooked.
Add 1 tablespoon soy sauce and half a tablespoon sugar to season.
Place the stir-fried ingredients over rice to serve.