Preheat oven to 400°F
Pat the pork tenderloin dry
Trim any silver skin or excess fat
Season all over with salt, pepper, and desired spices
Heat oil in an oven-safe skillet over medium-high heat
Sear the pork on all sides until browned
Transfer the skillet to the oven
Roast until the internal temperature reaches 145°F
Remove from the oven and let rest for 5 to 10 minutes
Slice and serve