Preheat oven to 425 degrees. Place flatbread on a baking sheet and bake for 3-4 minutes.
Spread pesto on top of flatbread, leaving 1/2 inch around the edge. Sprinkle mozzarella over the top.
Place shredded chicken, feta cheese & sundried tomatoes evenly on the top of the pizza.
Bake the flatbread 7-8 minutes until the edges are crispy and cheese is melted. Remove from oven and slice into squares or triangles. Top with fresh chopped basil, if desired.