Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
 In a skillet, melt butter over medium heat and scramble the eggs with salt and pepper until just set.
 Roll out the puff pastry and cut it into 4 equal rectangles.
 Place scrambled eggs, chopped bacon, and shredded cheddar cheese on one half of each pastry rectangle.
 Fold the pastry over the filling and press the edges together with a fork to seal.
 Brush the tops with the beaten egg wash for a golden finish.
 Bake for 18–20 minutes until the pastry is puffed and golden brown.
 Let cool slightly before serving.