In a bowl, mix together vegetable oil, chilli sauce and soy sauce for the marinade.
Slice chicken breasts into thin strips, add to the bowl, season and mix together. Heat a wok. When hot, lift the chicken from the marinade (reserving the marinade), add to the wok and stir-fry for 5 minutes until lightly golden.
Add stir-fry vegetables, noodles and the reserved marinade. Stir-fry for a few minutes until piping hot.
Mix in chopped peanuts, then divide between 4 bowls. Drizzle with more soy sauce to serve (optional).