Beef Fillet on Potato Rosti with Red Wine Jus is a delicious and elegant dish that combines tender beef fillet with crispy potato rosti and a rich red wine jus. The beef fillet is seared to perfection, creating a caramelized crust while keeping the center juicy and tender. The potato rosti adds a crispy texture and a subtle earthy flavor. The red wine jus is made by reducing red wine with shallots, garlic, and beef stock, resulting in a velvety sauce that complements the beef and potato rosti beautifully.