Sort the mushrooms and cut into not too thin slices.
Heat ghee or clarified butter in a non-stick pan and fry the mushrooms until the juice has evaporated. Then fill up with the wine and vegetable stock and the spices and let everything simmer nicely at a medium temperature. The consistency can be varied a little with the amount of liquid.
At the same time, fry the Kassel slices in another pan with a little oil until golden brown on both sides.
Place the meat on a platter and pour the mushrooms over it. Tastes very good with a potato salad or with fresh bread or baguette.