Slow Cooker Bavarian Meatball Sandwich is a hearty and flavorful sandwich that is perfect for a crowd. The meatballs are made with a combination of ground beef, breadcrumbs, and spices, then cooked in a tangy and savory sauce. The meatballs and sauce are served on a soft roll, topped with melted cheese and sauerkraut for a delicious and satisfying meal.