Cut pizza dough into 8 sections on a floured surface.
With one section, roll out dough until flat and circular.
Spread 1 tablespoon of marinara on flattened dough. Wrap up two meatballs in a slice of mozzarella and place them in the center of the dough. Sprinkle with ½ tablespoon parmesan cheese and some fresh basil.
Fold one side of dough up and over ingredients, and seal calzone by crimping the edges together.
Place on a parchment-lined baking sheet. Apply egg wash to outside of calzone and sprinkle with black pepper.
Bake calzones for 15-20 minutes or until golden brown.