2.Heat a frying pan over moderate heat. Spray with oil.
3.Add egg; tilt to cover base. Cook 2 minutes, or until set underneath. Turn; cook a further 1 minute, or until golden brown underneath. Slide egg onto a chopping board: slice thinly.
4.Combine chicken, remaining onion, half the noodles, snow peas, carrot and cabbage in a large bowl. Whisk sauces and dressing in a jug; drizzle over salad.
5.Spoon salad onto a large serving platter. Top with remaining noodles, omelette and coriander leaves to garnish. Serve.
Fish sauce is salty; taste before adding extra salt.