Mix all ingredients for the pasta in a blender.
Put the tofu o a flat plate and cover with the pasta. Allow to marinate in the fridge for half an hour. Cut the bok choi lengthways and grill for a short while in a hot grill pan. Heat the oil in a frying pan and bake the tofu on all sides until gold brown. Slice the tofu.
Put the bok choi on the plates and drizzle some ketjap sauce over them. Cover with the slices of tofu and serve immediately.