Chicken 65 - South Indian

Ingredients (240 ml cup used) 250 grams or ¼ kg boneless chicken cubes 1 tsp ginger garlic paste ¼ tsp pepper powder ¾ tsp kashmiri or byadgi red chili powder 1 sprig curry leaves chopped finely salt as needed 1 tsp oil 1 tsp. vinegar ¼ tsp garam masala powder or biryani masala powder ¾ tbsp. corn flour or corn starch oil for deep frying 1 egg for half kg chicken(optional)