This is a simple recipe from Alsace, where chicken is braised in a simple Riesling-cream sauce. It's essentially a chicken fricassee without the extra vegetables.
Leberknödel are a specialty of the Upper-Rhine, and the Palatinate, in particular, is famous for them. They are meatballs or dumplings formed from liver, bacon, and spices, creating a savory and very distinctive flavor. While this recipe comes from Alsace, it differs little from other recipes in other regions.