Preheat the oven to 350°F (175°C).

Measure 2 tablespoons olive oil. Reserve 1 tablespoon of the oil for later. In a small bowl, combine the remaining 1 tablespoon olive oil with 1/2 teaspoon garlic powder.

Use the olive oil + garlic mixture to brush (grease) a bundt pan or a 9x13-inch baking dish and to lightly coat the inside of a large mixing bowl.

Lightly flour a cutting board or work surface. Roll the 2 pounds pizza dough into a 12 x 9-inch rectangle. Cut the dough into 1-inch cubes.

Place the dough cubes into the greased mixing bowl. Add 2 cups mozzarella cheese, 1/4 cup freshly grated Parmesan cheese, 2 teaspoons Italian seasoning, 1 teaspoon garlic powder, 1/4 teaspoon crushed red pepper flakes, and up to 1 cup of your chosen pizza toppings. Toss gently until the ingredients are evenly distributed.

Spread the dough-and-topping mixture evenly into the prepared bundt pan or 9x13 baking dish. Brush the reserved 1 tablespoon olive oil evenly over the top of the dough.

Cover the pan loosely with a clean towel and let the dough rest for 15–20 minutes while the oven finishes preheating.

Bake until the bread is cooked through and golden brown: 30–35 minutes for a bundt pan or 15–20 minutes for a 9x13 baking dish. Check halfway through baking; if the top is browning too quickly, tent with aluminum foil and continue baking.

Remove from the oven and let cool in the pan for 5 minutes. If you used a bundt pan, run a butter knife around the edges to loosen the bread and invert it onto a serving platter. If you used a baking dish, you may serve directly from the dish or transfer the bread to a platter.

Serve warm with 2 cups marinara sauce for dipping.