Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper.
On a lightly floured surface, roll out the pizza dough into a rectangle, approximately 1/4 inch thick.
In a mixing bowl, combine the mozzarella cheese, chopped vegetables, black olives, pepperoni, Italian seasoning, garlic powder, salt, and pepper. Mix well to combine.
Spread the filling mixture evenly over the rolled-out dough, leaving a 1-inch border around the edges.
Carefully fold the edges of the dough over the filling, starting with the longer sides. Pinch and seal the edges to secure the filling.
Transfer the sealed bread onto the prepared baking sheet.
In a small bowl, whisk the egg and brush it over the top of the bread for a golden finish.
Cut a few slits on top of the bread to allow steam to escape during baking.
Bake in the preheated oven for 25-30 minutes or until golden brown.
Once done, allow the garbage bread to cool for a few minutes, then slice and serve warm.
Notes
Serve on a wooden cutting board with fresh basil and marinara sauce for dipping.