In a medium bowl, combine the diced onion, sweet corn, bell peppers, chili flakes, pizza seasoning, salt, and grated mozzarella. Mix well until all the ingredients are evenly combined.
Take a semi-cooked tortilla and cut it in half. Place a spoonful of the filling on one half, arranging it into a triangular shape. Fold one side of the tortilla over the filling, then fold the opposite side over it to form a neat triangular wrap. Repeat with the remaining tortillas and filling.
Heat a pan over medium heat and lightly grease it with butter. Place the wraps seam-side down and cook until golden and crisp. Lightly butter the top, then carefully flip and cook the other side until golden brown and the cheese has melted.
Transfer the crispy pizza wraps to a serving plate and serve hot with your favorite dipping sauce or dressing.