1. Add salt and curry leaves to buttermilk .

2.Crush remaining ingredients on a grinding stone and tie in a muslin bag .Steep in the buttermilk .

3. With a spoon ,press the bag a few times to extract flavour .

4. Set aside for 2 to 3 hours .

5. Strain and serve in Pony tumblers .If desired ,a small piece of lime leaf can be floated on top .