Grind the grated coconut with coriander powder, Chilli powder and turmeric powder with a little bit of water to a fine paste.
Mix the prawns with a little bit of salt, coconut bits, 1/4 teaspoon turmeric, 1/4 teaspoon chilli powder, 1 sprig of curry leaves, shallots, garlic and ginger.
Place the earthern pot over the flame.
Pour 1/4 cup of water and gambooge and let boil.
Add the prawns into it along with remaining curry leaves.
Let cook till the prawns are done.
Add the ground paste into it and mix well.
If needed, add more water.
When it starts to boil, switch off heat.
If using coconut oil, drizzle it on top of the curry.
Serve hot with Rice.