Preheat the oven.Preheat the oven to 375°F (190° C).Prepare the dough.On a lightly floured board, lay out the pizza dough into a large rectangle about 10x14 inches.
Add the sauce:Spread the pizza sauce evenly on the dough, leaving a 1-inch border around the borders.Layer the fillings:Sprinkle the shredded mozzarella and Parmesan cheese over the sauce.
Distribute the sliced ham, salami, and pepperoni evenly over the cheese.If desired, add sautéed mushrooms and sliced bell peppers.
Roll the dough.Roll the dough into a tight log starting with the long side.Pinch the edges to seal, then tuck the ends under.
Prepare to bake:Place the stromboli, seam side down, on a baking sheet coated with paper.
Brush the top with beaten egg, then sprinkle with dried oregano and garlic powder
.Bake:Bake in a preheated oven for 25 minutes, or until golden brown.
Serve:Allow the stromboli to cool for a few minutes before slicing. Serve warm and enjoy!