Preheat oven to 425°F. Trim silvery skin from pork. Pat dry with paper towels.
Mix 1-2 teaspoons poultry seasoning, 1 teaspoon salt, 1/2 teaspoon garlic powder and 1/2 teaspoon black peppers together in a small dish.
Rub seasonings into the meat. Then heat olive oil in a large, oven-safe skillet. Sear tenderloin for two minutes per side, then slide the skillet into the oven.
Roast for 18 minutes, or until the internal temperature reaches 145°F. Remove from the oven and spoon some of the juice over top. Tent with foil and allow to rest for 5 minutes.
Slice into 1/2 inch thick slices. Serve while hot.
Notes
Store in an airtight container in the refrigerator for 2-3 days.