Line a baking pan with parchment paper.
Place tortilla shell on the baking sheet, add a spoonful (or more if desired), of pizza sauce to the top of the shell and spread evenly.
Place pepperoni to cover pizza as desired then top with shredded cheese.
Turn oven to broil on the "low" setting. Place baking sheet with pizza in the oven on the top rack and close the overn. ** Make sure to watch your pizza carefully. This will only take a few minutes and can burn quickly if you are not watching. (time will vary depending on the heat of your low broil setting and position of the top rack).
The cheese on your pizza will melt and start to get a nice brown color, remove and let cool. Slice and serve!