Take a mixing bowl add mashed potato.
Now add chopped onion and tomato and green chilly.
Now add green chutney, Tamarind and jaggery chutney, curd and mix well
Now add roasted cumin powder, Black salt, chaat masala and salt and mix well.
Now place the papdi's in serving plate.
place the potato masala on each papdi.
Then top up with some green chutney some tamarind chutney and curd.
Now top up with chopped onion.
Garnish with sev aur coriander leaves.