Cut the boneless chicken into 1 inch cubes. Add in thin yogurt, vinegar, salt and chilli sauce.
Mix, cover and refrigerate overnight or at least 2-3 hours to allow the meat to tenderize properly.
Dry Coating: Mix all the ingredients.
Egg coating: Beat the eggs.
Coating process: Take a chicken piece out of the yogurt marinade and drench in dry coating thoroughly. Then dip in egg coating and drench in dry coating again. Repeat for all the popcorn chicken pieces.
Fry for 3-4 minutes on a little more than medium flame (should be high though).