"My #1 way to cook a pork tenderloin or a boneless pork loin because its ALWAYS moist and tender. Its easy and foolproof! If you like, marinate the roast and rub with any seasonings that please your palate! So many people have asked me how long to cook tenderloins if they have more than one to cook, I wanted to give a simple response. ANSWER: So long as the tenderloins are NOT touching each other, cook 3 or 4 individual tenderloins for the same amount of time as if you were cooking one. Remember, each tende..."