Place the flatbreads on a baking sheet or pizza stone.
Spread marinara sauce evenly over each flatbread.
Sprinkle shredded mozzarella cheese on top of the sauce.
Add pepperoni slices, black olives, and bell peppers as desired.
Sprinkle with dried oregano.
Bake in the preheated oven for about 15 minutes, or until the cheese is melted and bubbly.
Remove from oven, slice, and serve hot.
Notes
Feel free to customize the toppings to your liking. This recipe is versatile and can easily be made vegetarian or topped with your favorite meats and vegetables.