Traditional Beef Rouladen is a classic German dish made with thinly sliced beef, filled with a flavorful mixture of onions, mustard, pickles, and bacon. The beef rolls are then seared and simmered in a rich gravy until tender. This dish is hearty and comforting, with a perfect balance of savory and tangy flavors. It is often served with mashed potatoes and red cabbage for a complete and satisfying meal.