1. Preheat oven to 400℉. Spray a large sheet pan with cooking spray. 2. Unroll pizza dough on a very lightly floured countertop and gently roll or stretch it out into a 12” square. Cut into nine 4” squares. 3. Place 1 teaspoon marinara in center of each square. Top with mozzarella and a few pieces of pepperoni. 4. Brush edges of dough with egg and fold dough over filling to make a triangular shape. Use the tines of a fork to seal the edges. Repeat with remaining pieces of dough and filling. 5. Place pockets on prepared sheet pan and brush tops with egg. Sprinkle with Parmesan and oregano. 6. Bake until golden brown, about 15 minutes. 7. Serve warm with remaining marinara for dipping.