Instructions 1. Bring a large pot of water to a boil then add prawns and salt. 2. Lower heat and simmer for about 6 minutes or until the prawns are no longer translucent. 3. Remove from heat and, in a strainer, run cold water over them. 4. Set on a large dish and place in refrigerator to cool. 5. Serve cold, with mayonnaise or lemon wedges.