Pork tenderloin a cut that is very lean, tender, and boneless, and a bit pricey. It's delicious roasted as long as you don't overcook it. 18 minutes I find is right on. With the addition of the dry brine producing a succulent tasty tenderloin. Tenderloins are usually sold in pairs do not confuse with pork loin which is a larger roast. If you do use adjust cooking times. If there's a silver membrane on the tenderloin, remove it before cooking. Use a thermometer to check if done so not to lose any juice by cutting into the meat. When at 150° which is well above the 137° necessary to kill any trichinae. Will produce tenderloin that's juicy, tender, and safe.