Preheat Oven: Set your oven to 400°F (200°C). Line a baking sheet with parchment paper.

Prepare Filling:
Warm a touch of olive oil in a skillet set over medium heat until it shimmers gently, ready to bring your aromatics to life.

Sauté the onion and bell pepper over medium heat for 3 to 4 minutes, stirring now and then, until they’re tender and release their aroma.

Add ground beef and Italian sausage. Cook until browned and cooked through. Drain excess fat.

Season generously with garlic powder, dried oregano, a pinch of red pepper flakes, and a touch of salt and freshly cracked black pepper to build layers of bold, savory flavor. Stir until the spices are evenly distributed, then take the pan off the heat and let the mixture cool slightly before assembling your rollups

Assemble Rollups: On a lightly floured surface, roll out the pizza dough into a large rectangle, roughly 10 by 14 inches.

Sprinkle mozzarella, cheddar, and Parmesan over the center, leaving a 1-inch border.

Gently spoon the savory meat mixture over the bed of cheese, using a spatula to spread it evenly all the way to the edges for a perfect bite in every slice

Carefully roll the dough into a log, starting from the long side. Carefully seal the roll by pinching the seam along the edge, then fold and tuck in the ends to lock in all that delicious filling.

Bake: Transfer to the baking sheet seam-side down. Brush with beaten egg for a glossy finish.

Transfer to the oven and bake for 20 to 25 minutes, or until the crust turns golden brown and the filling is hot and bubbling with flavor.

Serve: Let rest for 5 minutes before slicing. Serve warm with marinara sauce.