If you're baking these, preheat your oven to 450 F degrees.
Roll out the pizza dough so that it's about 1/4 of an inch in thickness. Using a 2 inch cookie cutter cut out rounds.
Top each round with a pepperoni slice and a piece of mozzarella cheese. Bring dough up around filling; press edge to seal and shape each into ball. Repeat with remaining dough.
If you're baking these place balls on a baking sheet and bake for about 10 minutes or until golden.
If you're frying, heat oil in a cast iron pot or a large skillet. Fry a few balls at a time until golden brown.
Serve with pizza sauce and freshly grated Parmesan cheese.