prawn cocktail By Guest Contributor January 1, 2008 Fish Preparation Time Cook Time Servings0Ingredientstomatoe ketchupmayo or salad creamprawnspepper/saltInstructions Step 1: mix together equal amounts of mayo and ketchup. add pepper and salt. the mixture should be a peachy pink colour. Add the prawns to the mixture and make sure they are covered with the sauce. Prawn cocktail is ready!