Cool filling completely before assembling. Remove excess moisture from mushrooms to avoid soggy pastry. Serve warm for the best flaky texture.
Golden puff pastry filled with tender beef and savory mushroom duxelles, baked into elegant appetizer-sized turnovers.
1 pound (450 g) beef tenderloin or sirloin, cubed
1 teaspoon (5 g) kosher salt
½ teaspoon (2 g) black pepper
1 tablespoon (15 ml) olive oil
8 ounces (225 g) cremini mushrooms, finely chopped
2 cloves garlic, minced
1 tablespoon (14 g) unsalted butter
½ teaspoon (2 g) fresh thyme leaves
1 sheet (14 ounces / 400 g) puff pastry
1 large egg
1 tablespoon (15 ml) water
Cook mushrooms in butter until moisture evaporates. Add garlic and thyme; cool completely.
Season and sear beef cubes briefly in olive oil. Cool fully.
Roll out puff pastry and cut into 4 squares.
Add mushroom mixture and beef to center of each square.
Fold into triangles and seal edges firmly.
Brush with egg wash and cut small slits on top.
Bake at 400°F (200°C) for 18–22 minutes until golden brown.