Cut ,Wash and clean the crabs. Separate the crabs from the leg pieces.
Marinate these with salt,lime juice and 1 Teaspoon turmeric powder.
Keep this aside.
In a pan,add oil,add onion,tomato,garlic,ginger,grated coconut,peppercorns,cloves,cinnamon,mace and turmeric powder.
Fry till the mixture is brown and leaves aroma.
Let it cool and grind to a smooth paste.
In the same pan,add more oil,add chopped onion,when its slightly pinkish,add crabs,add little water and 1 teaspoon sugar.
Mix well.Cook for a while.
Add kanda-lasun masala and malvani masala.
MIx well.
Add ground paste.
Mix further.
Cook till crabs are done and the water is dried.
Add cilantro and finally add grated coconut.
Serve hot with Rice,curry...Enjoy!!