Place the Kassel pieces flat in a baking dish. Spread the frozen hash browns directly on top. Mix the two types of sour cream and spread over the Kasseler and Röstis. Then place in the oven at 160 ° C for about 1 to 1.5 hours.
We still serve sauerkraut with it. This dish can also be prepared very well for several guests, since you really have no work.