Add savala , potato and tomato and 1 tsp coriander powder salt 1 tsp meat masala Ginger garlic and 1 cup water to crab and bring into boil.
Close the lid and boil for 15 minutes .
After completely done gas off and heat another pan and add oil and splutter mustard seeds, then fry shallots add I tsp coriander powder , 1 tsp meat masala and garam masala fennel powder , and finally curry leaves to it. Then add this to crab.and bring this to boil again. Now it is ready to serve