First peel boiled potato mash little bit add dry salt,red chilli ,chopped ginger,green chilli,coariander and mix then add bread crumb and mix properly.
Make small balls and shallow fry in oil till crisp and golden.
Pressure cook cholle for 15-20 min with salt and water, then in a pan heat oil add chopped onion ,tomato and cook till all oil start seprating then add red chilli powder,coriander powder and mix.
Then add pressure cook cholla in prepared masala and cook for 5 min and add garam masala,raw mango powder ,your cholla is ready.
For serving in a plate first put tikki then chopped tomato, onion pour some yogurt and then add tamrind chuttney and sprinkle chaat masala on top.