When you are ready to bake the pizza, pre-heat the oven to 515F degrees. Line a large sheet pan with parchment paper and spray with cooking oil
Carefully transfer pizza dough from bowl into the sheet pan. From here strech the dough into a rectangle using your hands. It shouldn't be hard as the dough is very strechy but be gently to not pull the dough to harshly that it breaks. The pizza doesn't need to be perfectly uniform which is why its called rustic
Add marinara sauce divided into six scoops. Spread evenly until about 1in to the edge of the dough.
Add soppressata and pepperoni slices. You don't have to use both. Alternatively you can use any meat cut you like.
Top with onion slices and season with pizza seasoning, red pepper flakes, salt and pepper, grated parmesan cheese and drizzle with olive oil.
Bake for 12-13 minutes. If desired you can broil for an additional 1 minute.
Transfer to a cooling rack. Wait about 3-5 minutes before slicing