Here's a method and not necessarily a recipe for cooking the packaged marinated pork tenderloins that you buy in the grocery store.
Brown the tenderloin in a cast iron skillet (with a little bit of oil) and then put the cast iron in a preheated 360 degree oven to finish for about 40 minutes (turning once about half ways through).
This method produces a very moist tender hunk of meat. I use this for not only tenderloins but also london broil, whole chicken sliced in half, pork loin, venison backstrap, etc. You can add mushrooms, onion, potato wedges, whatever goes with the meat of your choice, and have a complete one skillet dinner. Season appropriately.
If you've never tried this - give it a go. I'm sure you'll be pleasantly surprised.
