Pour another 3/4 tbsp oil to the pan and heat up
Add cumin, green chilli and garlic
When the garlic is lightly roasted add curry leaves and saute till crisp.
Pour the ground mixture and add water or coconut milk
bring the gravy to a boil and cook on a medium flame until the gravy thickens and you see traces of oil on top
Add the prawns to the gravy and cook until they swirl up to C shape.