Grab a springform/loose bottomed pie dish that is slightly less wide than your tortillas. Pop a tortilla in the bottom. Top with pizza sauce, mozzarella, pepperoni and parmesan. Repeat until everything is used up and your tin is full.
Cover with foil and bake for 20 minutes at 180°C/ 350°F.
Remove from the tin, adorn with candles, light them, then sing happy birthday.