Beef tenderloin wrapped in prosciutto and puff pastry is Italian-style beef Wellington. This high protein mediterranean showpiece is a carnivore family dinner for special occasions.
Pat the beef tenderloin dry and season all sides with salt, black pepper, and chopped rosemary.
Heat olive oil in a heavy skillet over medium-high; sear the beef on all sides for 2–3 minutes per side, until deeply browned. Remove and let cool for 10 minutes.
On a flat surface, arrange the prosciutto slices overlapping to form a layer. Place the cooled beef on top and wrap tightly, ensuring the prosciutto covers the tenderloin evenly.
Roll out the puff pastry into a rectangle large enough to envelop the beef. Place the prosciutto-wrapped beef in the center, wrap the pastry around, and seal the edges firmly. Brush the surface with beaten egg.
Preheat the oven to 400°F (200°C). Place the pastry-wrapped beef seam-side down on a baking sheet. Bake for 35–40 minutes, until the pastry is golden and the beef reaches an internal temperature of 125°F for medium rare. Rest for 10–15 minutes before slicing.