Cut each biscuit into quarters and place in a large bowl.
Add the shredded mozzarella, mini pepperoni slices, melted butter, garlic powder, and dried oregano to the bowl. Mix until well combined.
Place the mixture into a greased bundt pan in an even layer.
Cover the bundt pan with foil and place it in the Ninja Foodi.
Cook for 20 minutes, then remove the foil and cook for an additional 5 minutes until golden brown.
Let it cool for a few minutes before flipping it onto a plate.
Serve with marinara sauce for dipping.
Notes:
For a spicier version, add some red pepper flakes to the mixture. You can also experiment with other pizza toppings like olives, mushrooms, or bell peppers.