Evenly spread Hot Barbecue and Wing Sauce over the entire flatbread, leaving a 1/2 inch border around all sides. Top sauce with mozzarella/cheddar blend. Top cheese with chicken. Evenly distribute spinach and tomatoes over the chicken.
Sprinkle feta cheese on top and bake in a pizza oven until crisp.
Remove, cut, and drizzle more Hot Barbecue and Wing Sauce over the pizza.