Seared beef medallions encased in puff pastry with mushroom duxelles and prosciutto; golden, crisp, elegant.
# What you'll need:
→ Beef
01 - 6 beef filet medallions (2–3 oz each), about 1.5 inches thick
02 - Salt, to taste
03 - Black pepper, to taste
→ Mushroom Duxelles
04 - 8 oz cremini or button mushrooms, finely chopped
05 - 1 small shallot, finely minced
06 - 2 garlic cloves, minced
07 - 2 tablespoons unsalted butter
08 - 1 tablespoon fresh thyme leaves, chopped
09 - Salt, to taste
10 - Black pepper, to taste
→ Assembly
11 - 1 sheet all-butter puff pastry (about 14 oz), thawed if frozen
12 - 3 oz prosciutto, thinly sliced
13 - 1 large egg, beaten (for egg wash)
14 - All-purpose flour, for dusting
# Method:
01 - Preheat oven to 400°F. Line a baking sheet with parchment paper and set aside.
02 - Pat beef medallions dry and season both sides generously with salt and black pepper.
03 - Heat a skillet over high heat until very hot. Add a small amount of oil, sear medallions 1 minute per side until browned but still rare inside. Transfer to a plate and refrigerate until completely cool.
04 - Using the same skillet over medium heat, melt the butter. Add shallot and garlic and sauté about 1 minute, then add chopped mushrooms and thyme. Season with salt and pepper and cook, stirring frequently, until all moisture has evaporated and mixture is dry, about 8 minutes. Remove from heat and cool completely.
05 - On a lightly floured surface, roll puff pastry to approximately 1/8 inch thickness. Cut the sheet into 6 squares large enough to fully enclose each medallion.
06 - Place a slice of prosciutto on each pastry square, then spread a spoonful of cooled mushroom duxelles over the prosciutto, leaving a small border for sealing.
07 - Place a chilled seared medallion on top of each duxelles-topped prosciutto. Fold pastry up and around the meat, sealing the edges and trimming any excess dough. Set each parcel seam-side down on the prepared baking sheet.
08 - Brush each parcel with beaten egg. Use trimmed pastry scraps for decorative shapes if desired and brush those with egg wash as well.
09 - Bake for 18–20 minutes, until pastry is golden brown and crisp. Remove from oven and let rest 5 minutes before serving.