Preheat oven to 400 degrees F. Lightly coat a 10-inch cast-iron or other heavy oven-going skillet with cooking spray. Sprinkle lightly with cornmeal. In a small bowl combine melted butter, garlic, oregano, and pepper.
On a lightly floured surface, unroll pizza dough. Brush some of the butter mixture crosswise over half of the dough; sprinkle with mozzarella cheese. Fold uncovered dough half over filling. Starting from folded edge, cut with a pizza cutter into 1-inch strips. Arrange strips in prepared skillet. Brush with remaining butter mixture; sprinkle with Parmesan cheese.
Bake 20 minutes or until golden. Let stand 5 minutes before serving. Sprinkle with parsley.