1. Prepare the Beef Filling:
- Season the beef cubes or strips with salt and black pepper.
- In a skillet over medium-high heat, heat olive oil. Add the beef and cook until browned on all sides. Remove the beef from the skillet and set it aside.
- In the same skillet, add chopped onions and garlic. Sauté until softened.
- Add chopped mushrooms to the skillet and cook until they release their moisture and become golden brown. Stir in Dijon mustard and cook for an additional 2-3 minutes.
- Return the cooked beef to the skillet, mixing it with the mushroom mixture. Remove from heat and let it cool.
2. Prepare the Puff Pastry:
- Preheat your oven according to the puff pastry package instructions.
- Roll out the puff pastry on a floured surface. Cut it into squares or rectangles, depending on your preference and the size of your turnovers.
3. Assemble the Turnovers:
- Place a portion of the cooled beef and mushroom mixture in the center of each puff pastry square.
- Fold the pastry over the filling to create a triangle or rectangle shape. Press the edges to seal.
4. Apply Egg Wash:
- Beat the egg and brush it over the tops of the turnovers. This gives the pastry a golden and shiny finish.
5. Bake:
- Place the turnovers on a baking sheet lined with parchment paper.
- Bake in the preheated oven according to the puff pastry package instructions or until the pastry is golden brown and crispy.
6. Serve:
- Allow the Beef Wellington Turnovers to cool slightly before serving.
- Serve them as appetizers or as a main dish with a side salad.
Enjoy your Beef Wellington Turnovers, a delicious and elegant dish with the rich flavors of the classic Beef Wellington in a convenient, individual form.