Dry roast the pine nuts in a small pan until golden and set aside.
Bring a large pan of salted water to the boil and add the noodles. Reduce to a simmer and cook for 4 minutes, taking care not to overcook them.
Once cooked, rinse them under cold running water to prevent them sticking.
Wash the bok choy, trim and roughly chop - don;t chop too small or it will overcook. Steam for no more than 2 minutes to ensure that the stalks remain crunchy.
Remove from the heat and stir the bok choy through the noodles.
Add the dressing and top with the pine nuts.