# What You'll Need:
→ Beef
01 - 14 oz beef tenderloin, cut into 3/4-inch cubes
02 - 1 tablespoon olive oil
03 - Salt and freshly ground black pepper, to taste
→ Mushroom Duxelles
04 - 7 oz cremini mushrooms, finely chopped
05 - 1 small shallot, finely minced
06 - 1 garlic clove, minced
07 - 1 tablespoon unsalted butter
08 - 1 teaspoon fresh thyme leaves, chopped
→ Pastry
09 - 2 sheets ready-rolled puff pastry (17.5 oz total)
10 - 1 egg, beaten (for egg wash)
→ Optional
11 - 2 tablespoons Dijon mustard
# Steps to Follow:
01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - Pat beef cubes dry and season with salt and pepper. Heat olive oil in a skillet over medium-high heat and sear beef cubes for 30 seconds on each side without cooking through. Transfer to a plate and cool.
03 - In the same skillet, melt butter over medium heat. Add shallot, garlic, and mushrooms, cooking until the moisture evaporates and the mixture turns golden, about 5 to 7 minutes. Stir in thyme and season with salt and pepper. Cool completely.
04 - Cut puff pastry sheets into 20 squares approximately 2.75 x 2.75 inches each.
05 - If using, lightly brush each beef cube with Dijon mustard.
06 - Place a small spoonful of mushroom duxelles in the center of each pastry square. Top with a beef cube. Fold corners over to enclose filling and pinch edges to seal. Place seam-side down on prepared sheet.
07 - Brush each pastry parcel with beaten egg to promote browning.
08 - Bake for 15 to 18 minutes until the pastry is golden and puffed.
09 - Allow bites to cool slightly before serving warm.
