Grünkohlessen

Grünkohlessen is an old wintertime custom in North Germany, and parts of Scandinavia (Denmark and Scania), involving drinking, games, and a feast of regional dishes, typically featuring kale, potatoes, and sausages. It is practised in the Free Hanseatic City of Bremen and its surrounding districts of Osterholz, Diepholz, Verden and Rotenburg, in Oldenburg Land, the County of Bentheim, Emsland, Osnabrück Land and East Frisia, in the Middle Weser Region, and also in Hamburg, Cuxhaven, in the Hanover Region, Brunswick Land, in the Magdeburg region, in Westphalia and Schleswig-Holstein. Grünkohl (similar to Braunkohl and the Dutch boerenkool but with curly cale instead of cabbage, and creamed) is curly-leafed kale, a type of cabbage, traditionally harvested after the first autumn frost. The late harvest of kale ensures that its bitter-tasting constituents have disappeared, although modern kale varieties are generally low on bitter components and are harvested as early as in September.

Source: Wikipedia