- Start by deveining the prawns and then washing them nicely. Pat them dry and put them in a bowl. Add salt, red chilli powder and turmeric along with lemon juice. Let this mix marinade for 15 minutes. Add the rest of the ingredients into the bowl and mix it well. Add some water if you want the batter to be slightly thick. Meanwhile, heat some oil in a Kadhai and fry them one by one. Serve hot.