We take raw not frozen shrimps and clean them from the shells (if they are not cleaned). You can cook them by dropping them into boiling water for 2-3 minutes or cook them as I do in my own Way. For this View, put the prawns in a zip lock bag, squeeze out the air, submerging the bag in water and holding the neck above the water. Seal the zip lock and cook in a dry Form at 57°C for 25-30 minutes.