Fillet steak is a tender steak cut of beef. This steak cut is the most expensive cut of beef taken from tenderloin. Fillet steaks are boneless and can be cooked in various ways by using different ingredients. Baked fillet steak, broiled fillet steak and fish fillet steak are some of the popular fillet steak recipes.Filet steak is popular in continental cuisine. It is generally served as main dish. Filet steak is not only easy to make but also very healthy. Filet steak forms a part of omega-3 diet.