Preheat the oven to 400°F (200°C).
Prepare the baking sheet with parchment paper.
Roll out the pizza dough on a floured surface.
Layer the ham, cheese, and spinach over the dough.
Sprinkle garlic powder and Italian seasoning on top.
Roll the dough tightly into a log.
Seal the edges and place it on the prepared baking sheet.
Brush the top with beaten egg.
Make slits in the top for steam to escape.
Bake for 20-25 minutes or until golden brown.
Let it rest for 10 minutes before slicing.