01 -
Heat olive oil in a skillet over medium-high heat. Season beef cubes with salt and pepper. Sear each piece for 2-3 minutes per side until a golden crust forms. Remove from heat and allow to cool slightly.
02 -
In the same skillet, add mushrooms, shallots, and garlic. Cook over medium heat, stirring frequently, until the mushrooms release moisture and the mixture turns golden brown, about 5-7 minutes. Stir in thyme and season with salt and pepper. Remove from heat and let cool.
03 -
Lightly dust a clean surface with flour. Roll the thawed puff pastry to approximately 1/8 inch thickness. Cut into uniform 3-inch squares.
04 -
Place a spoonful of cooled mushroom duxelles onto each pastry square. Top with a seared beef cube and optionally brush with Dijon mustard. Fold the pastry over to form a pocket, sealing the edges by pressing with a fork.
05 -
Preheat oven to 400°F (200°C). Arrange the bites on a parchment-lined baking sheet. Brush each with beaten egg wash. Bake for 15-20 minutes until the pastry is puffed and golden brown.
06 -
Allow bites to cool for a few minutes before serving warm for best texture and flavor.