Peel off the cooked potato and chop it in to cubes. Add chaat masala powder, salt and let the cubed potatoes coat well with it. Meanwhile take yogurt in a bowl and beat it well with sugar, keep it ready.
Next break the puri by poking your finger and make hole. Keep 7 such puri's on a plate and stuff the boiled potato and cooked peas in each of the puri. Then pour yogurt, green chutney and sweet chutney over them.
Finally sprinkle red chilly powder and generously top them with nylon sev and chopped coriander leaves. Very addictive and wonderful chaat is ready.
Notes
Serve this dahi puri chaat immediately, if you let it rest, the puri loses the crispiness.
If you have the puri and chutneys handy, whipping this up would be easy.
Adjust chutneys and topping as per your preference. You can even stuff the sprouted green gram or chickpeas to make it healthier.