01 - Preheat oven to 425°F (220°C). Line a baking tray with parchment paper.
02 - Place the whole wheat pita breads flat on the prepared baking tray.
03 - In a small bowl, combine the tomato sauce, dried oregano, and garlic powder. Spread the mixture evenly over each pita, leaving a thin border around the edges.
04 - Scatter the diced bell pepper, seeded tomatoes, red onion slices, mushrooms, and baby spinach evenly across both pita breads.
05 - Sprinkle the shredded mozzarella over the vegetables, then crumble the feta on top if using.
06 - Bake for 10 to 12 minutes until the cheese is fully melted and the pita edges are golden and crisp.
07 - Remove from the oven and top with fresh basil leaves. Season lightly with freshly ground black pepper.
08 - Cut each pita pizza into wedges and serve immediately while warm.