where do the cuts of steak come from
Cut of beef Cuts of beef are first divided into primal cuts, pieces of meat initially separated from the carcass during butchering. These are basic sections from which steaks and other subdivisions are cut. The term "primal cut" is quite different from "prime cut", used to characterize cuts considered to be of higher quality. Since the animal's legs and neck muscles do the most work, they are the toughest; the meat becomes more tender as distance from hoof and horn increases. Different countries and cuisines have different cuts and names, and sometimes use the same name for a different cut; e.g., the cut described as "brisket" in the US is from a significantly different part of the carcass than British brisket. "Cut" often refers narrowly to skeletal muscle (sometimes attached to bones), but can also include other edible flesh, such as offal (organ meat) or bones without significant muscles attached.
Filet mignon The tenderloin runs along both sides of the spine, and is usually harvested as two long snake-shaped cuts of beef. The tenderloin is sometimes sold whole. When sliced along the short dimension, creating roughly round cuts, and tube cuts, the cuts (fillets) from the small forward end are considered to be filet mignon. Those from the center are tournedos; however, some butchers in the United States label all types of tenderloin steaks "filet mignon." In fact, the shape of the true filet mignon may be a hindrance when cooking, so most restaurants sell steaks from the wider end of the tenderloin - it is both cheaper and much more presentable.