Soak ½ cup chickpeas in water for 8 hours or overnight.
After 8 hours rinse it well and drain water. Add it to pressure cooker.
Add water till immersing level.
Pressure cook for 4 whistles. Switch off.
Let pressure release by itself.
Drain water completely.
Rinse potatoes well to get of dirt and mud - Rub and wash it at least 2-3 times. Then add 4 medium sized potatoes to a pressure cooker. Add water till half immersing level at least.
Pressure cook for 2 whistles. You can choose to boil or steam potatoes too. Make sure it is soft but not mushy.
Remove the potatoes from the cooker and add it to a bowl containing cold water.
Once it becomes warm peel off the skin from the potatoes.
Cut into small cubes. Set aside.
To a mixing bowl add cubed potatoes and cooked chana.
Add salt to taste, 2 tablespoon green chutney, 2 tablespoon sweet chutney, 1 teaspoon red chilli powder, 1 teaspoon roasted cumin powder and 1 teaspoon chat masala powder and juice from 1 lemon.
Mix it well.
Add required portion to a serving plate.
Crush and add 2-3 puris. Drizzle sweet chutney, green chutney.
Add raw onion, sev and finally garnish with coriander leaves.
Serve and enjoy!