Fillet mignon, also known as beef tenderloin, is a popular cut of beef that comes from the small, tapered end of the beef tenderloin. It is known for its tender texture and rich flavor and is often considered one of the most luxurious cuts of beef. Fillet mignon is usually prepared by grilling, broiling, or pan-searing, and is often served with a sauce or topping such as mushroom sauce, peppercorn sauce, or blue cheese.