Making Ham and Cheese Puff Pastry Sticks is simple if you follow these steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Prepare Puff Pastry: Roll out the thawed puff pastry on a floured surface to avoid sticking. Cut it into long rectangles, about 2 inches wide.
3. Mix Fillings: In a bowl, combine the chopped ham, shredded cheese, and mustard if using. Mix well and season with salt and pepper.
4. Assemble Sticks: Place a small amount of the filling mixture along one edge of the pastry rectangle. Fold the pastry over to create a stick shape, pinching the edges to seal tightly.
5. Egg Wash: Beat the egg in a small bowl. Brush the tops of each pastry stick with the egg wash to give them a beautiful golden color as they bake.
6. Add Seeds: Sprinkle sesame or poppy seeds on top if desired for added flavor and texture.
7. Bake: Place the prepared puff pastry sticks on the lined baking sheet and bake for 15-20 minutes or until they are golden brown and puffed up.
8. Cool and Serve: Once they’re out of the oven, let them cool slightly before serving.

Follow these straightforward steps, and you’ll create crispy, delicious Ham and Cheese Puff Pastry Sticks that everyone will love!