Preheat the oven to 400°F
Pat the pork loin dry
Season all sides with salt, pepper, and desired spices
Heat oil in an oven-safe skillet over medium-high heat
Sear the pork loin on all sides until browned
Transfer the skillet to the oven
Roast until the internal temperature reaches 145°F
Remove from the oven
Rest the pork loin for 10 to 15 minutes
Slice and serve