Preheat the oven to 425F, spray a baking sheet with some non stick spray.
On a flat surface, roll out the pizza dough, cut it into 8 equal square or rectangle pieces.
Place the cut dough pieces onto the baking sheet, using just one side of the dough add 1 tbsp of pizza sauce, 2 tbsp of mozzarella, 2 slices of pepperoni, and a sprinkle of peppers, onions and mushrooms.
Fold over the dough and form a triangle pocket shape, pinch any seams closed.
Lightly spray the tops with some of the cooking spray, sprinkle with a little parmesan cheese and Italian seasoning.
Bake in the oven for 10-12 minutes or until the dough is golden brown, let cool for 5 minutes. Serve with some pizza sauce or ranch/garlic for dipping.