Preheat your oven to 425°F (220°C).
Prepare the vegetables by chopping them into bite-sized pieces.
In a mixing bowl, toss the chopped vegetables with olive oil, oregano, and garlic powder.
Spread the seasoned vegetables on a baking sheet lined with parchment paper and roast for 20-25 minutes.
While the vegetables roast, prepare the flatbread by spreading marinara sauce evenly over the surface.
Once roasted, spread the vegetables over the sauced flatbread evenly.
Sprinkle shredded mozzarella cheese over the vegetables.
Bake the flatbread pizza for 10-15 minutes or until the cheese is bubbly and lightly browned.
Remove from the oven and top with fresh basil leaves before slicing.