In bowl, add yogurt, 1/2 cup Tamarind pulp from 1 cup (tamarind mix with water, chat masala & 1 tbsp sugar), half chat masala, black salt, sugar and mix it
In chopper, add tomato, onion, green chili, some coriander and chop them.
Add chickpea in same sauce bowl, boiled potatoes, add gram flour puffs (squeeze properly before adding in bowl), chopped mixture and mix well.
Garnish with tamarind pulp and chat masala, enjoy!