1. cut the onions and tomatoes 2. dry roast red chillies,cumind seeds, curry leavesf for few minutes and add coriander powder and fry for a minute and keep it aside. 3. take a table spoon of oil in a pan and fry half of the cut onions and keep it aside. 4. grind together the igredients mentioned in step 2&3 and make a paste 5.grind the coconut separately 6.take oil in a pan and add mustard seeds, fenugreek seeds, curry leave , the remaining onion and saute well.after that add tomatoes and saute well 7 add the paste from step 4 along with tamarind sauce and allow it to boil 8 add the coconut paste and allow it to boil 9 add the fish pieces and keep the flame in sim for 10 minutes 10 turn off the gas and the kulambu is ready 8