Heat oil in a pan and temper with cumin seeds and fenugreek seeds. Saute for a few seconds. Add rest of the ingredients (except tamarind paste and salt).
Stir fry for 2-3 minutes on a low flame. Set aside to cool. Then grind along with tamarind paste and salt.
Store in airtight container and relish as an accompaniment to idli, dosa, upma or any south Indian breakfast.