Heat the oil in a pan. Sauté the onion and all the other ingredients up to and including the kaffir lime leaves for approx. 3 mins.
To prepare the soup
Pour in the stock and soy sauce, bring to the boil. Add the noodles and Chinese cabbage, cook for approx. 3 mins. until just al dente. Plate up the soup, top with the eggs and coriander.