Mix together chicken keema, ginger, green chillies, red chilli powder, coriander powder, garammasala powder, chaat masala, onion, soya granules, potato and cornstarch in a bowl.
Add whisked egg and salt and mix well. Heat oil in a non stick pan. Grease your palms, divide the mixture into equal portions and shape each into a pattice.
Place them in the pan, a few at a time, and shallow fry, turning sides till golden and crisp from both the sides. Drain on absorbent paper. Transfer onto a serving plate and serve hot.