Preheat the oven to 400°F / 200°C
Pat the pork fillet tenderloin dry with paper towels
Trim off any silver skin or excess fat
Season all over with salt and black pepper
Add garlic powder, paprika, or herbs if desired
Heat an oven-safe skillet over medium-high heat
Add a little oil to the skillet
Sear the pork on all sides until browned
Transfer the skillet to the oven
Roast until the internal temperature reaches 145°F / 63°C
Remove from the oven and rest for 5 to 10 minutes
Slice against the grain and serve