Combine sauce ingredients in a bowl and mix and leave aside.
Cut beef into thin slices and Marinate in bicarbonate of soda, soy sauce and black pepper for 10-15 mins (not longer!).
Toss beef in cornflour until fully coated.
Spray a little oil in bottom of the airfryer, add the beef and brush or spray with oil.
Airfry on high for 15 mins shaking it every 5 mins.
Meanwhile on a pan with a bit of oil fry green onion.
After a few mins add the sauce and let sizzle for a few seconds.
Add the beef and mix together and let cook in the sauce for a bit.
Garnish with more spring onion and sesame seeds and red chilli if you wish.
