“Specifically you would use what in Germany they call a Dusseldorf-style mustard with that, which is horseradish mustard and sauerkraut,” Schaller says. “You could also do the red ...

While most comments were positive, a few fans pointed out that one of the ingredients, Dusseldorf mustard, might be hard to find at their local supermarkets. "Let me just grab my Dusseldorf ...