Amma's Vetha Kuzhambu

Soak tamarind.  Heat a little Idhayam oil and add hing.  Keep it aside.  Grind 1/4 cup coconut and keep aside.  Burst 1 tsp mustard seeds, 1 1/2 tsp methi seeds, 1 red chili, 3 tsps tuar dal. Grind into a paste. In some regular oil, saute some vethal.  Once done, add coconut paste, tamarind water and salt and if needed some jaggery.  Then add seed paste.  Boil until raw smell goes.  

Mom just added hing to the oil before adding coconut.