Soak the noodles according to the packet instructions, then drain and rinse under cold running water. Set aside. Heat a splash of oil in a wok or large frying pan until smoking, then add the onion ...
Add the noodles, mirin, soy sauce and rice vinegar and stir-fry until the noodles are hot through. Drizzle with sesame oil and scatter with the green parts of the spring onions and the sesame ...