Place the onions, garlic, ginger, star anise, and cinnamon stick into the slow-cooker pot.
Rub 1 teaspoon of five-spice powder over the pork and place on top of the onions and spices.
Pour the soy sauce into the pot and cook on high for 4-6 hours, or on low for 8-12 hours.
To cook in a conventional oven, preheat to 160C/325F/Gas 3. Follow steps 1 and 2 as above but place into an ovenproof dish instead of the slow cooker pot. Cover with foil and cook for 2½ hours, then remove foil and cook for a further 45 minutes.
To make the slaw, place all of the vegetables into a large bowl. Toss together with lemon juice and salt to taste. Cover and refrigerate till needed.
About half an hour from the end of cooking time, make the sauce - place all the ingredients into a small saucepan and bring to the boil.
Reduce to a simmer and cook for 10-15 minutes, stirring often until the sauce has thickened.
Remove from the heat and set aside to cool.
Remove the pork from the pot and pull with two forks.
Pour over the cooled sauce and serve with the slaw.
Notes
Slimming World Syns per serving: FREE when Food Optimising.