Heat 1 tbsp of sesame oil in a large wok over medium-high heat and cook the pork in batches for 1 - 2 minutes, stirring continuously. Transfer to a plate and cover loosely with foil and set aside.
Place noodles into a pan of boiling water and cook for three minutes. Drain and leave to soak in cold water to prevent the noodles sticking together.
Reduce heat to medium add 1 tbsp sesame oil to wok and cook ginger, capsicum and mushrooms for 1 minute. Drain the noodle and add them to the pan with the tamari, hoisin, mirin, shallots, coriander and cook for 2-3 minutes, stirring continuously. Add the pork and bok choy and cook for 2 minutes or until leaves just wilt.