Mix together the prawns,
turmeric and salt and set aside for 10 minutes.
Puree the coconut milk, coconut, coriander and cumin
seeds, chilies, peppercorns, mustard seeds,
tamarind, onion, garlic and ginger to a paste,
adding the water if necessary.
Heat the oil and fry the puree
for 10 minutes, stirring continuously. Stir in
the prawns and curry leaves and simmer for 10
minutes.
Garnish with the coriander and
serve hot with rice, chutney and vegetables.