Step 1: Marinate 100 gms prawns in kokam juice for about 5-10 mins. Take 1 cup corn flour in a plate. Add 2 tsp chilli powder, salt, turmeric powder, coriander powder and mix well. Now take the marinated prawns and put in the mixture. Cover it properly with the mixture. Heat some oil in the pan. Now take the prawns in the and fry it in the oil. Cook it for about 4-5 mins properly. Serve it hot.