Heat a wok or large frying pan over a medium-high heat. Add 1 tablespoon vegetable oil and swirl it around the pan. Add 1/4 large onion (sliced), 1 handful fresh beansprouts and softened noodles. Add 1/2 teaspoon dark soy sauce and 50 ml water and stir-fry in the pan for 30-40 seconds. Add 1/2 teaspoon light soy sauce, 1/4 teaspoon sea salt, 1/4 teaspoon MSG, 1/4 teaspoon caster sugar and 1/8 teaspoon ground white pepper. Stir-fry for 1 minute. Add 1 spring onion (sliced) and mix well. Set the noodles aside on a serving plate. Wipe the wok or frying pan clean.