I love this chutney in its simplest form, no flavorings other than the pure sweetened tamarind. You can add mint if you like, but it tastes better as it is! :)
Soak quarter kg tamarind in water for 3-4 hours, squeeze out and sieve the gunk from it, and then add half cup sugar and a pinch of salt, boil until it thickens. Taste and adjust sugar according to your taste.
TIP: If you like, you can use gur/jaggery instead of sugar, just add a lump of it to the tamarind and let it boil, keep tasting and when the sweetness is to your liking, remove the lump of gur and turn off the heat. :)