I came up with this dish after combining several different recipes. I wrap up each beef tenderloin, topped with a tasty mushroom mixture, in a sheet of puff pastry. It sounds like a lot of work, but it isn't...and it's so elegant. -Julie Mahoney St. Edward, Nebraska
1In a large skillet, brown steaks in oil on both sides. Place a wire rack on a baking sheet; transfer steaks to wire rack. Refrigerate for 1 hour. Meanwhile, preheat oven to 400°. In the same skillet, saute mushrooms and onions in butter until tender; drain. Stir in the salt and pepper.
2On a lightly floured surface, roll pastry into a 13-in. square. Cut into 4 squares. Place one steak in the center of each square; top with mushroom mixture. Combine egg and water; brush over pastry.
3Bring up corners to center and tuck in edges; press to seal. Place on a parchment-lined baking sheet. Cover and refrigerate for 1 hour or overnight.
4Bake, uncovered, until pastry is golden brown and meat reaches desired doneness (for medium-rare, a thermometer should read 135°; medium, 140°; medium-well, 145°), 20-25 minutes.