1. Preheat the oven to 400°F (205°C) and line a baking sheet with parchment paper.
2. Roll the pizza dough into a rectangle approximately 10 × 14 inches.
3. Spread Dijon mustard over the dough, leaving a 1-inch border. Sprinkle half of the mozzarella and cheddar evenly over the dough.
4. Layer the ham over the cheese, then sprinkle the remaining mozzarella, cheddar, and Parmesan on top. Season with Italian seasoning, garlic powder, and black pepper.
5. Roll the dough into a tight log from one long side. Tuck the ends inward and pinch the seams closed.
6. Transfer to the baking sheet, seam-side down, and cut 4–5 small slits across the top.
7. Combine the melted butter, olive oil, garlic, Italian seasoning, Parmesan, and parsley. Brush generously over the stromboli.
8. Bake for 25–30 minutes, until deep golden brown and the cheese inside is melted.
9. Let rest for 10 minutes before slicing.
10. Slice and serve warm with marinara sauce, garlic butter, ranch dressing, or honey mustard for dipping.

This Cheesy Ham Stromboli brings golden, crispy, cheese-pull perfection to your table — proof that a few simple ingredients wrapped in pizza dough can create something truly irresistible.