Set your oven to 425°F (220°C) to start warming it up.
Lay the flatbread on a baking sheet and brush it lightly with olive oil all over for a golden, crisp crust.
Spread the basil pesto evenly across the flatbread surface.
Scatter the cooked chicken pieces on top of the pesto layer.
Add fresh tomato slices and then arrange the fresh mozzarella pieces evenly.
Sprinkle salt, pepper, and garlic powder over everything for an extra flavor boost.
Place the flatbread in the preheated oven and bake for about 12 to 15 minutes until the cheese melts and edges are crispy.
Once baked, remove from oven and top with fresh basil leaves.
If you like, drizzle balsamic glaze over the flatbread for a tangy-sweet touch before serving.