Slice vegetables and cube pork. In a jug, whisk together tomato sauce, soy sauce, vinegar, and pineapple juice.
Cook rice as per packet instructions.
Heat ½ tbsp oil in a wok or large pan over medium–high heat. Stir-fry pork until just cooked through. Remove and set aside.
Add remaining ½ tbsp oil to the pan. Stir-fry onion, capsicum, and carrot until starting to soften. Add the pork and pineapple, then pour over the sauce.
Add sliced bok choy
Add the cornflour slurry, stir to coat, and cook for a few minutes until the sauce has thickened.
Serve with rice.
