Wash the prawns an apply some salt and let it rest.

In a mixie jar add scrapped coconut, turmeric powder, chilli powder, sambhar powder, ginger, garlic, salt, add some water and make a fine paste.

In a pan pour oil, saute finely chopped onion, add the above paste, tamarind puree and fry well.

Pour half a litre water and boil it well now put the prawns, one whole green chilli and let it cook for 7-8 minutes, if the curry looks runny, take 1/8 th cup water put 1teaspoon rice flour, to make a thin paste and pour it in the curry till desired consistency is obtained.

Serve hot with steamed rice.