01 -
Set the oven to 375°F (190°C) and line a baking sheet with parchment paper.
02 -
Roll out the puff pastry sheet on a lightly floured surface into a rectangular shape.
03 -
If using, spread a thin layer of Dijon mustard over the pastry. Place the slices of ham evenly across the pastry. Sprinkle the shredded cheese on top of the ham, spreading it evenly.
04 -
Starting from one of the long edges, tightly roll the puff pastry into a log. Seal the edge by pressing gently.
05 -
Place the rolled pastry in the refrigerator for 10–15 minutes. This makes slicing easier.
06 -
Using a sharp knife, slice the chilled roll into 1/2-inch thick pieces.
07 -
Arrange the slices on the prepared baking sheet, leaving space between each pinwheel. Beat the egg in a small bowl and brush the tops of the pinwheels with the egg wash. Sprinkle with Italian seasoning or parsley if desired.
08 -
Bake in the preheated oven for 15–20 minutes, or until the pinwheels are golden brown and puffed.
09 -
Let the pinwheels cool slightly before serving. Enjoy them warm or at room temperature as an appetizer, snack, or party treat.