First of all take the chapati and roast it

Now take the jar add roasted chapati and grind it

Take a big bowl add grind chapati, potato, onion, salt, red chilli powder, chaat masala and mix and and make the mixture.

Now make the round shape from the mixture.

Take the tava and apply oil and roast the tikki

Take a serving plate add tikki and katchup and serve it