Preheat oven to 400F.
Add oats to food processor and process for 2 minutes to make oat flour.
3 cups oats
Add egg whites, salt, black pepper, baking powder, extra virgin olive oil, and ½ cup water and process/pulse until dough forms. If needed, add two tablespoons of water and pulse/process until a dough with desired consistency forms. See notes*
3 egg whites, ½ teaspoon salt, ¼ teaspoon black pepper, 2 teaspoon baking powder, ¼ cup olive oil , ½ - ¾ cup water
Roll the dough out on oiled parchment paper to fit a 14-inch pizza pan. Pinch together the edges to make a smooth circle.
Brush oil across the entire surface of the crust. Bake for 5 minutes. Using another pizza pan lined with parchment paper, flip the entire crust onto the second pan. Bake for 4 minutes.
Add desired toppings and bake until cheese is bubbly and melted, about 12-14 minutes.
1.4 cups pizza sauce, 2 - 3 cups mozzarella cheese, shredded, 2 ounces pepperoni , ¼ cup shredded basil