01 -
Remove puff pastry sheets from packaging and let thaw until pliable.
02 -
Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
03 -
Roll out each sheet slightly if needed. Slice each puff pastry sheet into six rectangles using a sharp knife or pizza cutter.
04 -
Brush the edges of each pastry rectangle with whisked egg, then spread Dijon mustard in the center.
05 -
Place one slice of Gruyère cheese and a folded slice of ham onto the mustard center of each pastry piece.
06 -
Lift one corner of the pastry towards the center and fold the opposite corner over to enclose the filling. Press edges gently to seal.
07 -
Transfer pastries to the lined baking sheet. Brush the tops with remaining egg wash and sprinkle everything bagel seasoning if using.
08 -
Bake in the preheated oven for 18 to 22 minutes until golden, puffed, and cheese is melted.
09 -
Remove from oven and allow to cool briefly before serving warm.