Creating the delightful Ham and Cheese Puff Pastry Pinwheels can be accomplished through these simple steps:

1. Preheat the Oven: Start by preheating your oven to 400°F (200°C). Line a baking sheet with parchment paper.

2. Prepare the Pastry: On a lightly floured surface, roll out the thawed puff pastry into a rectangle, about 1/8 inch thick.

3. Lay the Ham: Evenly layer the slices of ham across the puff pastry, leaving a small border around the edges.

4. Add Cheese: Sprinkle the shredded cheese on top of the ham, ensuring it covers the surface adequately.

5. Optional Mustard: If desired, spread a thin layer of mustard over the ham and cheese for added flavor.

6. Season: Sprinkle with a touch of salt and pepper. You can also add fresh herbs for extra flavor.

7. Roll the Pastry: Starting at one edge, carefully roll the puff pastry away from you to form a log. Ensure it’s tightly rolled for best results.

8. Slice the Pinwheels: Use a sharp knife to cut the rolled pastry into 1-inch wide pinwheels.

9. Prepare for Baking: Place the pinwheels onto your prepared baking sheet, spacing them about 1 inch apart.

10. Apply Egg Wash: Brush the tops of the pinwheels with the beaten egg for a golden finish during baking.

11. Bake: Place the baking sheet in the oven and bake for 15-20 minutes, or until the pinwheels are puffed up and golden brown.

12. Cool and Serve: Once baked, remove from the oven and let them cool slightly before serving.