First, fold a sheet of Letter paper into a small cone as follows: Fold the paper in half across its width, then fold again in the same way to form a rectangle. Now take one of the corners on the length of the folded paper and fold it across to the other long side, to form a trapezium. Then take the free corner and fold the paper back on itself, to form a kite shape. Press the paper into a cone and fold the corners sticking out at the top inside it. Then wrap the cone in baking parchment. Make four of these paper cones.
Cut the pizza dough crossways into four identically sized portions. Roll each piece around a paper cone.
Stand the cones upside down on a baking tray and bake for 20 minutes at 360°F. Once they have cooled slightly, remove the paper cones.
To fill a cone, you can set it the right way up in a glass. Start with a small amount of cheese, add a tablespoon of pizza sauce on top, then onions, chopped pepper and pepperoni slices. To finish, add more cheese on top. Then bake the cones for another 5 minutes at 360°F.