To begin with, soak mustard seeds and poppy seeds in warm water for 30 minutes. Simultaneously mix the prawns/shrimp with salt and turmeric and keep aside for half an hour
Now make a paste of mustard seeds, poppy seeds, green chillies, salt and water. Adding the salt and chillies will avoid the mustard paste to get bitter. Also grind the coconut separately to a smooth paste and keep it aside
Now heat a shallow pan and add mustard oil, when it starts to release the smoke add to it the marinated prawns and fry it all in a low flame
When its 3/4 cooked add the mustard paste and mix well, also add 1/2 cup water and allow it to cook with the lid on for 2 minutes
Finally add the ground coconut paste and mix well. Check for seasoning and add salt if required. Allow it to boil for half a minute and then turn off the heat.
Delectable prawn curry is ready! Serve it hot with steamed rice.