Making Ham and Cheese Sticks can be easy if you follow these straightforward steps:

1. Preheat the Oven: Start by preheating your oven to 400°F (200°C). This ensures even cooking.

2. Prepare the Puff Pastry: Roll out the thawed puff pastry on a lightly floured surface. Cut the pastry into rectangles, approximately 4×6 inches.

3. Layer Ham and Cheese: Place a slice of ham and cheese on one side of the pastry rectangle. If desired, spread a thin layer of mustard over the ham.

4. Fold the Pastry: Fold the pastry over the filling, pressing the edges down to seal. Use a fork to crimp the edges for a decorative touch.

5. Prepare for Baking: Beat the egg in a small bowl and brush the mixture over the top of each pastry stick for a beautiful glaze.

6. Season: Sprinkle a little salt and pepper on top, along with any fresh herbs if using.

7. Bake in the Oven: Place the sticks on a baking sheet lined with parchment paper. Bake for about 15-20 minutes or until golden brown.

8. Cool Slightly: Once baked, let them cool on a wire rack for a few minutes to allow the cheese to set slightly.

9. Serve: These sticks are best enjoyed warm, but you can also serve them at room temperature.