Place flour, cornstarch, sugar, baking powder, and kosher salt into stand mixer bowl. Start mixing at low speed. Add olive oil to water and slowly pour into mixer bowl. Slowly increase speed and knead dough until it fully comes together. You may ad small increments of water if dough doesn't form after a couple minutes.
Place the dough on a lightly floured surface and divide into three equal balls. Lightly flour and wrap in plastic wrap. Place in refrigerator for 45 minutes.
Place steel baking stone on middle rack and heat oven to 500 degrees. Let steel stone heat up for 20 min.
Meanwhile, on a lightly floured surface, use a rolling pin to roll out each ball into about a 12 inch circle. Four as need to prevent sticking. Dough will be thin. Randomly pierce dough with fork.
Open oven and pull out middle rack with steel stone. Place rolled dough on steel stone and close oven. Wait only 30 - 45 seconds! We only want to firm up the crust so it's easier to place back in oven with toppings. Repeat for each dough circle.
Add sauce and cheese to prepped crust. Finish with pepperoni or your favorite toppings. Using a pizza peel, transfer pizza back to steel stone and bake 8-10 minutes or desired doneness. When done, use pizza peel to remove from oven and place on cutting board. Cut into slices or squares and serve. Repeat.
Grab a couple beers and turn on football.