Crab curry/ gravy

My all time favourite. I learnt the recipe from my mother in law but till now I am not able to match up to her taste
Ingredients
Crab- 1/2 kg
Onion -2
Tomatoes -2
Ginger garlic paste - 1 test
Curry leaves
Green chillies -3 to 4
Coconut 5 to 6 thin strips
Chillie powder - 1to 11/2 tsp
Coriander powder - 2 tsp
Cummin powder -1/2 tsp
Turmeric powder -1/2 tsp
Gingelly  oil - 1 tbs
Salt to taste
Preparation
Clean the Crab by removing the shell. I got it cleaned in the fish stall itself.  Will demonstrate  the cleaning process in another post.. wash the cleaned crabs. Be careful so that the flesh does not get washed off..

Heat oil in a Kadai. Add the finely chopped onions and saute till golden brown..then add the ginger garlic paste and cook till the raw smell goes..add the tomatoes and cook till soft.. add the chillies and curry leaves.grind the coconut with Coriander powder, cumin powder , turmeric powder and Chillie powder.. add it to the onion and tomato mixture .. allow it boil for 5 to 10 minutes .. then add the Crab, add salt to taste. Cook covered. . Some water will come from Crab also.. see that there is adequate water so that it does not become too dry or too watery. Cook in medium flame for 10 minutes and low flame for 5 minutes. Before removing  from the stove, check whether the raw masala smell is gone. Sprinkle finely chopped  Coriander leaves. Serve with rice/ Idli or Chappathi .