Preheat oven to 400° and line a baking sheet with parchment paper. In a medium bowl, combine eggs, 2 cups mozzarella, and parmesan. Stir until combined, then season with salt, pepper, oregano and red pepper flakes. Spread mixture into a ½” thick round on baking sheet.
Bake until lightly golden, about 12 minutes.
Spread pizza sauce on top of baked crust. Top with remaining mozzarella, pepperoni, and bell pepper.
Bake until cheese is melted and crust is crispy, about 10 minutes more. Sprinkle with Parmesan, if using, before serving.
Recipe by Slim Pickins at https://www.slimpickins.org/2018/08/28/breakfast-pizza/