Pressure cook green moong an grind it along with channe ki dal, toor dal. It should be medium consistency the batter

Then in a bowl add the mixture,add the boiled potatoes,salt,green chillies, coriander leaves, garam masala powder,chat masala powder,an mix well

Then give a shape of tikki an deep fry it

If you want you can pressure cook the toor dal, channe ki dal an green moong together an then grind it. It should be medium consistency the batter