First make the puris and store it. You can check the recipe here.
To a mixing bowl add 3 medium sized boiled potatoes mashed. Add ½ cup chopped onion, 2 tablespoon coriander leaves, salt to taste, 11/2 teaspoon red chili powder, ½ teaspoon chat masala powder, ¾ teaspoon cumin powder and ¼ teaspoon black salt.
Mix it well and set aside.
To a mixer jar add ½ cup mint leaves, 1 cup coriander leaves, one 1 inch ginger, 2 green chillies, 3 tablespoon jaggery, ¼ teaspoon black pepper powder, ¼ teaspoon black salt, 1 ½ tablespoon tamarind, 1 teaspoon roasted cumin powder, ¾ teaspoon chat masala powder, salt to taste.
Add little water.
Grind it fine.
Transfer this to a strainer.
Strain well and discard the remains.
Add around 2 cups cold water and mix well. Adjust water according to your taste and preference.
Add 2 tablespoon boondi, mix well.
All the items are ready. I soaked ½ cup yellow peas overnight pressure cooked for 3 whistles and made it ready. The pani itself has sweetness so sweet chutney is optional but if you prefer you can add it.
Crack open a puri.
Add potato stuffing, cooked yellow peas.
Add raw onion, sweet chutney if needed.
Dip in prepared pani and serve immediately.
Serve immediately.