Place the pork in a shallow ovenproof dish and rub with the ginger, sesame oil, soy sauce and stem ginger syrup or honey until well covered. Leave to marinate for 10 minutes.
Make the dressing. Mix together all the ingredients in a bowl and set aside for the flavours to develop.
Cook the pork in a preheated oven, 180°C (350°F), Gas Mark 4, for 18–20 minutes or until cooked through but still juicy.
Meanwhile, mix the carrots, mangetout, bean sprouts and spring onions in a large bowl. Just before serving, toss with the dressing and pile into serving dishes. Sprinkle with the peanuts, if using, and top with the pork chops, drizzled with cooking juices. Serve immediately with steamed rice.