Let’s get started with these simple steps:

1. Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. On a lightly floured surface, roll out the puff pastry sheet to smooth any creases.
3. Cut the pastry into 8 equal squares using a sharp knife or pizza cutter.
4. Spread a thin layer of mustard on each square, if using.
5. Place a slice of ham and a generous sprinkle of cheese onto each square.
6. Fold the opposite corners of the pastry squares over the filling, pinching to seal the edges.
7. Brush each pastry with the beaten egg to achieve a golden-brown finish.
8. Season with salt and pepper, then bake in the preheated oven for 15-20 minutes, or until the pastries are puffed and golden.
9. Allow them to cool slightly before serving.

As you bake these squares, your kitchen will fill with the comforting aroma that reminds me of my grandmother’s love and the vibrancy of our family gatherings. Enjoy the process, and don’t rush — good things take time!