In a small sauce pan, add the tomato sauce, dried oregano, garlic powder, olive oil, pepper and salt. Stir together.
Heat on low to medium heat for about 15 minutes. Continue to stir as its cooking. Then set aside for a moment.
For the Pizza:
Slice off the top of each roll leaving about three quarters of the actual roll as the base for the pizza. Then slightly hollow out the middle of each roll by removing a small amount of the bread making sure to leave ample amount of crust (and some of the bread) around all of the edges. The bread should look like small “bowls”.
Spoon the pizza sauce in the middle of the "bread bowls".
Add half of the mozzarella cheese over the pizza sauce (reserving the remaining mozzarella cheese for another layer of toppings). Add half of the pepperoni (also reserving some pepperoni to make another layer of toppings).
Next add half of the black olives. Sprinkle half of the grated Parmesan cheese on top of the pizza.
Then add another layer of toppings using the remaining mozzarella cheese, pepperoni, olives, and Parmesan cheese.
Bake uncovered on a cookie sheet for about 15 minutes or until the cheese is melted. Serve hot right out of the oven.