In a small skillet over medium heat, stir together the garlic and butter until melted and smooth. Remove the skillet from heat and let the mixture cool, about 1 minute.
Brush the garlic butter over the inside of a bundt pan, evenly coating the entire surface. Set aside the remaining garlic butter.
Dived the pizza dough into roughly 48 large, marble-sized balls.
Working with one dough ball at a time, use your fingers to flatten out the dough into a small cup-sized circle. Add a slice of pepperoni and a cheese cube to the center.
Bring the sides of the dough together around and enclosing the pepperoni and cheese and use your fingers to pinch/seal the dough together tightly.
Lightly brush the dough with garlic butter and place it in the prepared pan.
Repeat until all of the dough balls have been filled, buttered, and put in the pan.
Cover the dish while preheating the oven to 400 degrees. Remove the cover and bake the dough for 35-40 minutes, until the dough is cooked throughout and the top's golden brown.
Remove the dish from the oven and let it rest for 10 minutes.
Working quickly, flip the bundt pan over onto the center of a serving platter or cutting board. Tap/knock on the top of the bundt pan (id needeto release the pull apart bread. Remove the bundt pan.
Sprinkle grated Parmesan evenly out over the top of the pull apart bread.
Fill a small glass prep bow with the warmed marinara and set in the center of the pull apart bread before serving. Refilling as needed.