Crush together garlic, ginger, pearl onions, green chillies and all masala.
Pop mustard seeds in oil and saute chopped onions well.
Add the ground masala and saute until oil seperates.
Add 1 cup water along with crab pieces.
Add gamboge soaked in water.
Make a bed of curry leaves on top and cook on medium heat for 10 mins.
Once it starts bubbling slowly, add coconut milk and add little more water if required.
Mix well and cook again on low heat for 5 mins.
:- Good to be served with rice and appams.