Heat a pan with oil. Add mustard seeds and let it splutter.
Now, add the black gram dhal, asafoetida, red chillies and fenugreek seeds and saute till the dhal turns golden brown. Switch off the fire and let it cool.
Transfer this to a mixer with coconut ,salt and tamarind. Add just enough water and grind it into a smooth paste.
Mix with hot rice and serve with kootu and appalam
Notes
Use of mustard seeds in the recipe is optional
Use of fenugreek seeds is optional
I soak the tamarind in lukewarm water for 10 minutes as it helps in grinding smoothly