I'm about to make moule marinier and was surprised to see a lot of the recipes had cream in them. I'm sure I remember watching an episode of Celebrity Masterchef where they had to prepare moule marinier and the judges being surprised at the people who put cream in the dish.
As it is supposedly a sailors dish, and I can't imagine sailors having fresh cream to hand it seems unlikely that they would traditionally contain cream. Is this right? Should moule marinier have cream in it? Or should I just finish the cooking liquor with a knob of butter at the end?