Wash and drain the chicken. Mix it with turmeric powder, salt, pepper and little bit of ginger-garlic paste and half cup of water.Cook well till the water is absorbed.
Boil potatoes and mash well.
Heat oil in a pan.Splutter mustard seeds and saute onions, until light brown. Add curry leaves, coriander leaves, green chillies, ginger and garlic. Add the mashed potatoes and the cooked chicken. Keep it on low flame, until the entire water is absorbed.
Allow the mixture to cool thoroughly.
Take a handful of this mixture and make balls.
Dip it in the beaten egg and then roll in the breadcrumbs.
Flatten it out slowly into thick patties.
Fry it in oil, till both the sides turn golden brown.