Marinate pork tenderloin (here is my favorite marinade recipe), or rub it with your favorite seasonings, at least 2 hours before cooking.
Preheat oven to 325 degrees F. Heat a grill or grill pan over very high heat.
Once the grill is hot, place the tenderloins on the hot, greased grill and sear over high heat, rotating the meat every 1-2 minutes, until well browned on all sides.
Place pork tenderloins in a baking dish and cover the pan with tinfoil. Bake for about 18-25 minutes, or until you reach an internal temperature of between 145° F – 160° F, depending on how well done you like your meat.
Remove from oven and allow the meat to rest for 10 minutes before cutting and serving.
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Notes
Pork Tenderloin: I buy pork tenderloin from Costco, because they're great quality and you get 4 for about $1.99/lb. Cook two and freeze the extras for another meal.Make Ahead Instructions: Marinate the pork 2 to 24 hours ahead of time.Freezing Instructions: Freeze the pork tenderloin in the marinade for up to 4 months, in an airtight freezer container. Thaw completely in the fridge before cooking. You can also freeze leftover cooked pork, and it to soup, like this Easy Pho or use it to make a Cuban sandwich.