For the Assembly:
- 1 sheet puff pastry, thawed if frozen
- Flour for dusting
- 1 egg, beaten (for egg wash)
Instructions:
Prepare the Beef:
Season the beef tenderloin with salt and black pepper. In a skillet over medium-high heat, heat olive oil. Sear the beef on all sides until browned. Remove from the pan and let it cool.
Prepare the Mushroom Duxelles:
In the same skillet, add chopped mushrooms, garlic, and thyme. Cook until the mushrooms release their moisture and become golden brown. Remove excess liquid.
Blend the mushroom mixture to a coarse paste. This is known as mushroom duxelles.
