Heat oil in a kadhai n fry sliced onions till it starts changing colour... take it out from the kadhai.. blend coriander seeds, cumin seeds to a fine powder, add coriander leaves, ginger, garlic n fried onions to the blender n blend to a fine paste.. keep aside
Heat 1 tsp oil in the same kadhai n saute the prawns along with turmeric n sprinkle some salt... saute for 2 -3mins. Take out on a plate.. keep aside
Heat 4 tbsp oil in the kadhai, add Kashmiri red chilli powder, cook for 1 min then add the onion paste made earlier... mix well, add garam masala n salt n cook till the oil leaves sides...
Then add 1.5cups of water n bring to boil... then add the sauteed prawns to it n lower the flame... cover lid n cook for 7-8mins... then add tamarind paste n mix n simmer for another 2 mins...
Garnish some chopped coriander n serve hot with rice
