In a pan add oil , 1/2cup small onion , garlic saute till translucent then add coconut and roast it .transfr this mixture into mixie jar and add coriander seeds , soaked redchillies ,turmericpdr and grind it to smooth paste
In a pan add oil , onion , ginger juliennes,curry leaves ,grinded paste ,add water and mix it well then add prawns , tamarind paste ,salt and allow it to cook then inallt add coconut milk coriander leaves n serve