Mix all the ingredients listed under 'To prepare the sauce mix' and set aside.
Cut the onions, capsicum, ginger, garlic, green chilies and spring onion whites.
In a wok/kadai on medium-high heat, add 2 tbsp oil and let it heat.
Add the ginger, garlic and spring onion whites and fry for a few seconds.
Add the green chilies and fry for a few seconds.
Add the chopped onions and capsicum and saute for 15-20 seconds on high heat.
Add the prepare sauce mix to the kadai. Mix well with the rest of the ingredients.
Prepare the corn flour slurry by mixing the corn flour and water together until well combined and add it to the sauce in the kadai.
Add black pepper powder and mix well. Let the sauce thicken until desired consistency is reached.
Add the fried chicken pieces and coat them uniformly with the sauce mixture.
Add some cut spring onion greens and toss well.
Serve hot with any fried rice or fried noodles.