where does the t bone steak come from
T-bone steak The T-bone and porterhouse are steaks of beef cut from the short loin (called the sirloin in Commonwealth countries and Ireland). Both steaks include a "T"-shaped bone with meat on each side. Porterhouse steaks are cut from the rear end of the short loin and thus include more tenderloin steak, along with (on the other side of the bone) a large strip steak. T-bone steaks are cut closer to the front, and contain a smaller section of tenderloin. The smaller portion of a T-bone, when sold alone, is known as a filet mignon, especially if it's cut from the small forward end of the tenderloin.
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.