Add a teaspoon of oil and add cumin.

when nice aroma comes add small onions.

Saute it for some time add jaggery,salt and tamarind to it and combine well.

After that add both coriander,green chillies and mint leaves to it.

Saute for a minute and switch off and let it cool.

Add coconut while grinding.

Make a fine paste.

Now do tadka with mustard and asafoetida and you are ready.