Take bowl add some flour (maida), vinegar, red chilli sauce, dark soya sauce and add water as needed.
Now beat the egg, add salt and pepper and mix it well.
Now add the egg in the mixture and mix it then add the chopped chicken pieces and marinate for 30 minutes.
Now heat the oil in pan to fry the marinated chicken pieces.
Now heat a pan, add oil, garlic, onions, green chillies and capsicum cook till it gets slightly brown, then add soya sauce, red chilli sauce, salt and little vinegar.
Now take a bowl, add corn flour and water as needed and mix it and add it to the pan.
Now put fried chicken pieces and let it cook for a minute.