No visit to the Rhineland would be complete with trying a good old-fashion Sauerbraten. A uniquely-spiced beef roast (sometimes made with horsemeat) marinated for days in a vinegar dressing, it acquires an acidic taste that pairs well with sauerkraut. In Dusseldorf, they even have their own variation on the traditional roast known as the Düsseldorfer Senfrostbraten, which has the meat covered in the spicy local mustard the city is known for. Though its strong flavor is not for everyone, the beef roast serves as a nice break from the pork-heavy traditional German fare.
Where to get it: Hausbrauerei Zum Schlüssel