Preheat your oven to 350 degree F.
Get a loaf pan prepared by spraying it with non-stick spray. Set aside.
On your work surface roll out, or hand stretch your dough until it's spread evenly. Use some flour to make sure you dough isn't sticky, it will make the stacking process easier later.
Now spread the pizza sauce over top evenly.
Sprinkle the the cheese over top.
Now toss the pepperoni over top.
Take a pizza cutter or knife and cut your pizza into squares that will fit into the pan vertically.
Stack about 4 squares high. I managed to get about 3 stacks with 4 high. Once you have them stacked take one at a time and carefully flip them sideways to they are standing up in the pan. So basically you're taking a horizontal stack and making it go in the pan vertically. Quickly do the same with your other stacks. It's okay if it doesn't touch the sides, it's going to expand as it cooks.
Place in oven and cook for about 15 minutes. Pull the oven rack forward and toss some extra cheese on top. Slide it back into the oven and cook for another 10 to 15 minutes. You want the top golden brown and the cheese all nice and melted.
Remove from oven and carefully take a knife and slide it around the edge of the pan to loosen the pizza. Turn upside down on a plate, then flip again onto another plate. This is a good skill to learn if you spend a lot of time in the kitchen.
Serve with a big old cheesy smile!