Sauce:

1. Whisk all the ingredients together.

Then follow as below:

1. Thinly slice beef, add bicarbonate of soda and leave for 10-15 minutes.
2. Rinse thoroughly and pat dry.
3. Marinade beef. Slice all vegetables thinly and place them in separate bowls.
4. Heat oil in a wok and add onions with a pinch of salt to taste.
5. Stir for 30 seconds.
6. Add peppers and stir fry for 1 minute.
7. Remove and set aside.
8. Add water chestnuts and bamboo shoots with salt to taste.
9. Stir for one minute and remove.
10. Add a little more oil to wok add bean sprouts stir for 1 minute and remove.
11. Add the mushrooms and stir fry for 1 minute. Remove.
12. Add cabbage/bok choy and carrots.
13. Sprinkle a little water around the edges to create a little steam.
14. Add salt to taste.
15. Stir for 2 minutes. Remove.
16. Add 2 tbsp oil to wok.
17. Add garlic and ginger stir a few seconds then add beef and stir fry.
18. When beef changes color you will make a well in the center of the beef, pour in the sauce and allow it to bubble, then mix beef through.
19. Add all the vegetables to the beef and mix through.
20. Sprinkle with chopped spring onion, and serve with plain Jasmine rice.