01 - Wash and dice bell pepper, mushrooms, and red onion, then set aside.
02 - Preheat a large nonstick skillet over medium heat and add olive oil.
03 - Add bell pepper, mushrooms, and onion to the skillet and cook for 3-4 minutes until softened.
04 - Lay tortillas flat and spread 3 tablespoons of pizza sauce on each tortilla. Sprinkle mozzarella and Parmesan cheeses evenly.
05 - Distribute sautéed vegetables and spinach equally on one half of each tortilla. Fold over and press edges firmly.
06 - Place folded tortillas in the skillet and cook for 2-3 minutes per side until golden brown and cheese is melted.
07 - Slice pockets into wedges. Serve warm.