Preheat oven to 375 degrees. Fit a sheet of parchment paper into the bottom into the bottom and up the sides of a 9 or 10-inch round or square baking dish or cake pan. If you don't want to use parchment, you can grease the pan with oil instead.
If using a block of mozzarella, cut into 16 equal pieces. Prepare any other ingredients you'd like to stuff in the dough to make sure they are small enough to fit.
Roll pizza dough into a log shape. Divide into 16 equal pieces.
Roll each piece of dough into a small ball then flatten the ball onto a work surface. Use your fingers to push into a round, flat disk. Place a piece of cheese and any other fillings you'd like into the center of the dough. Take the outside of the dough and bring it up and around the filling, pinching the dough together to seal the ball. Make sure to pinch it together really well or the cheese will leak out during baking. Place stuffed dough, sealed side down, into your prepared pan. Repeat with remaining dough.
Mix olive oil, Parmesan cheese, garlic powder, and Italian seasoning together in a small bowl. Using a pastry brush, coat the tops of each dough ball or spoon the mixture over the top of the dough.
Bake until golden brown and dough is cooked through, 20 to 25 minutes. Serve warm with pizza/marinara sauce for dipping.