Clean the crab, separate the legs and break the shell.
Peel the onion and slice it.
Peel the ginger, and crush it.
Slice the chillies in length wise.
In an earthen pot from Kerala or heavy bottomed pan, pour the oil.
Splutter the mustard seeds.
SautT sliced onion until soft.
Add the chilly powder, turmeric and salt soaked in little water.
Add to ginger and onion.
Reduce the heat to minimum and add the crab and the legs too and curry leaves too.
Add green chilies, lower the heat and cover the pan.
Cook until crabs are done.
Remove from heat and garnish with curry leaves.
:- Crab Curry is ready.
:- Serve hot the crab curry.