Heat oven to 375º F. Place meatballs on aluminum foil-lined baking sheet. Bake 15 minutes; gently turn meatballs over and bake an additional 10 minutes. Remove from oven and set aside. When cooled slightly, cut the meatballs in half.
Preheat oven to 400º F and line a sheet pan with parchment paper.
Unroll the pizza dough on the parchment and stretch to a 9"x13" rectangle. Using a knife or pizza wheel, cut the dough in half lengthwise, creating two long rectangles.
Gently move and shape the dough to create a ring.
Sprinkle the cheese down the middle of the dough and add the meatball halves over the cheese, spacing evenly. Spoon the sauce over the meatballs.
Stretch and pull both sides of dough up and between each meatball; press together to seal.
Add the Italian seasoning to the melted butter and brush over the dough.
Bake for 12 - 15 minutes, until golden. Serve with additional marinara sauce.