mix the chicken pieces with vinegar ,2 tsp soy sauce, chilli powder ,paprika ,salt and beaten egg.keep aside for 2 hours.
slice onion and green chilli thin.
heat oil in a pan and deep fry chicken pieces(keep aside the remaining marinade).
remove from oil keep aside. remove oil from pan leaving about 1 tbsp.add onion and green chillies and saute till golden brown.add the remaining marinade and cook till thickened.
add deep- fried chicken pieces and remaining soy sauce and little salt. .cook till done and serve hot.