I marinaded a pork tenderlion 20+ hoursand sliced it down the middle... about 6 pounds... and put it in the oven on high to sear,seer the outside... now I can't find my damn cook book so I know how long to cook it and at what temp... I know I need to turn it down on low but how low how long? I have a meat them... but don't want to keep opening the door. Thanks