Mix together your pani puri flour, salt and seltzer water. Knead until it becomes a dough. Set aside for 10 minutes.
Make little balls with the dough and then roll each ball out. You can make as big or as small as you'd like. Or, you can roll large amounts of dough and use a mini circle cookie cutter to cut out shapes.
Fry the puri's until golden brown and store them in an air tight container.
Chana & Potato
In a pressure cooker or your microwave, cook the chana and potatoes until fork tender. Dice the potatoes small, and slightly mash the chana and mix everything together. Add diced serrano peppers. Also add cayenne pepper, sanchar and salt per your taste.
Pani
In a blender, add your mint, garlic, thai chili's, cilantro, lemon juice and salt per taste. Blend until everything is broken up and it looks like a thick paste or chutney.
Add about 7-7.5 cups of water to the paste. You can add as little or as much water per your preference.
Add 2 tsp of sanchar to the pani and mix everything together.