1/2 cup Coconut (grated)1 no Onion (chopped)1 no Tomato (chopped)2 nos Green chillies (chopped)Salt (As reqd)1 tsp Mustard seedsOil (As reqd) For preparing thenga varutharacha chammanthi, first heat oil in a pan.Fry onion, tomato, green chillies, salt and coconut .When the color starts to change, remove from flame and grind it into paste.Heat oil in another pan, splutter mustard seeds and season it over chammanthi. Tamil