Heat the oil in a wok over a very high heat and stir fry the rump steak slices very quickly for 2 minutes..
Add garlic, ginger, onion, peppers and pak choi to the wok. Continue to stir fry over a high heat for a minute until the vegetables begin to soften.
Mix the soy sauce, oyster sauce and water together in a small bowl and add to the wok with fresh noodles.
Cook for a minute until hot. Sprinkle with chopped spring onion, chilli and coriander before serving.