Clean the prawns properly
Marinade with lil salt nd keep aside
Make a paste of coconut, green chili & garlic
Make a mixture of coconut paste , turmeric powder, mustard powder, salt & mustard oil
Marinade the prawns in this mixture for approx 15min
Now seal it in a tiffin and pressure cook for 15min or microwave for 20 minute
Serve hot with steamed rice nd a slice of lemon