"Brandade is a purely French specialty of pureed salt cod, but there is some debate over the addition of potatoes. Purists insist that cod alone is enough to create the smooth texture for which the dip is renowned. Other French cuisine experts enjoy the dimension added by potatoes and fearlessly throw them into the mix. This silky version is frequently served in Marseilles. Cook’s note: Be careful to bring the salt cod to just a simmer. If the cod is boiled, it will become tough and useless for this dip...."