In a large skillet over medium heat, cook ground beef, green bell pepper, onion, and garlic for 7–9 minutes, stirring often, until the beef is browned and crumbled.
Drain the grease, return the skillet to the heat, and stir in salt, black pepper, and Italian herbs. Cook for 1 more minute to bring out the flavors.
Preheat oven to 425°F (220°C). Lightly grease or line a rimmed baking sheet. Roll out the pizza dough into a rectangle, about 10x15 inches.
Sprinkle 1 cup mozzarella over the dough. Spread the beef mixture on top, leaving a 1-inch border. Add the second cup of mozzarella, then drizzle ¼ cup Parmesan-peppercorn dressing evenly over the filling.
Starting from a long edge, roll the dough tightly into a log. Pinch the seams to seal and place it seam-side down on the baking sheet.
Cut small slits across the top, about 1 inch apart. Bake for 20–25 minutes until the crust is golden and crisp.
Let it rest for 10 minutes, then slice and serve with the extra Parmesan-peppercorn dressing for dipping.