Preparation Season tenderloin lightly with salt and pepper. Wrap in plastic; refrigerate overnight. Uncover tenderloin; let stand at room temperature for at least 2 hours. Preheat oven to 400°F. Set a rack inside a rimmed baking sheet. Transfer tenderloin to rack. Pulse 4 teaspoons black pepper and remaining ingredients in a small food processor until well blended. Generously and evenly spread and pack Parmesan mixture around tenderloin. Roast until crust is golden brown and an instant-read thermometer inserted into thickest part of tenderloin registers 110°F-115°F for rare and 120°F-125°F for medium-rare, 30-40 minutes. Transfer to a carving board. Let rest for 20 minutes. Cut into 1/2"-thick slices, taking care not to lose too much of the delicate crust.
Preparation Season tenderloin lightly with salt and pepper. Wrap in plastic; refrigerate overnight. Uncover tenderloin; let stand at room temperature for at least 2 hours. Preheat oven to 400°F. Set a rack inside a rimmed baking sheet. Transfer tenderloin to rack. Pulse 4 teaspoons black pepper and remaining ingredients in a small food processor until well blended. Generously and evenly spread and pack Parmesan mixture around tenderloin. Roast until crust is golden brown and an instant-read thermometer inserted into thickest part of tenderloin registers 110°F-115°F for rare and 120°F-125°F for medium-rare, 30-40 minutes. Transfer to a carving board. Let rest for 20 minutes. Cut into 1/2"-thick slices, taking care not to lose too much of the delicate crust.