Unwrap the dough and place it into an oiled bowl. Cover loosely with a dish towel and allow the dough to reach room temperature.
Preheat oven to 425F degrees. Line a large baking sheet with parchment paper.
Lay the first sheet of pizza dough onto the prepared baking sheet and gently stretch it to fit. Place the second sheet of pizza dough on top of the first and stretch it to reach the same size.
Using a sharp knife, slice dough into a large triangle shape by slicing a diagonal line from the top center point of the rectangle down to the right lower corner. Slice another diagonal line from the top center point down to the left lower corner. Discard the excess dough.
Gently peel back one side of the top sheet of dough to expose the bottom sheet. Brush with pesto sauce and sprinkle the cheese. Cover it back over. Repeat this process with the other side of the dough.
Make horizontal slices on each side of the triangle from top to bottom, about 1 inch apart, leaving the center of the triangle intact. (See photos).
Twist each cut section of dough. Bake for 13-15 minutes.
While the pull apart bread is in the oven, make the Parmesan butter: melt the butter in a microwave safe bowl. Stir in the Parmesan and Italian seasoning.
While the pull apart bread is still hot, brush it with the Parmesan butter. Serve with pizza sauce for dipping.