Preheat oven to 400°F. Line a baking sheet with parchment paper.
Lightly flour a clean surface and roll pizza dough into a 10 x 18-inch rectangle.
Layer fillings in this order: Provolone cheese, Ham. Pepperoni, Mozzarella cheese, Bacon crumbles, Pepperoncini
Starting from the long edge, tightly roll the dough into a log.
Pinch the seam closed and tuck the edges underneath. Then place stromboli seam-side down onto prepared baking sheet.
Brush the top evenly with whisked egg.
Sprinkle pizza seasoning or garlic powder, onion powder, and oregano over the top.
Using a sharp knife, cut 3 shallow slits across the top.
Bake for 23–25 minutes or until golden brown.
Allow to rest for 5–10 minutes before slicing and serving.