Take a large mixing bowl and add yogurt to it. Combine sugar and salt to your taste and whisk to mix well.
Add boiled chickpeas, boiled potato cubes, finely chopped onion, and tomato to it.
Then add tamarind pulp or its juice as per the listed quantity. You can always change the quantity to taste.
Now add the prepared green chutney and .season with chaat masala.
Mix well, take out in a serving bowl, and time to feast.