Cut beef steak into thin slices. Mix the beef slices well with the ingredients from the beef marinade list. Set aside and marinate for 15 minutes.
Finely chop the garlic cloves. Cut pepper, onion and chillies into thin slices. Cut the spring onions into 1" pieces.
In a small bowl add all the stir fry sauce ingredients. Mix well and set aside.
Boil the noodles per packet instructions, drain the water out. Set aside.
Heat the pan to medium high heat, drizzle 2 tablespoon of oil. Add the marinated beef, flatten and spread the beef in the pan. Let it sear the beef for about 2 mins till the beef get nice colour and turn side and stir fry for another 1 minute.
Push the beef to one side of pan and add the chopped garlic. Stir well for few seconds and add the chilli slices and stir well.
Add the noodles and vegetables. Pour the stir fry sauce in. Mix well to combine all ingredients with high heat for 1-2 mins.
Spicy Hoisin Beef Noodles are ready! Serve immediately!