Preheat oven to 500 degrees F.: The air quickly hums and a faint dry heat sets the stage for fast melting and crisping. You should smell a faint warmth and, if your oven has a light, see the empty rack glow. This high heat helps the edges of the flatbread crisp while the cheese softens without getting rubbery. The common mistake is to use too low a temperature which yields limp crust, so resist lowering the heat.
Brush flatbreads with olive oil. Toss shredded chicken in pesto sauce.: A thin sheen of olive oil sizzles when it hits the hot surface, producing a golden edge and preventing sticking. You should hear a gentle hiss if the oil meets a hot pan, and the flatbread will develop small toasted freckles. Avoid pooling oil, because that can make the center soggy rather than crisp.
Layer flatbreads with thinly sliced mozzarella cheese, then tomatoes, and then shredded chicken.: When you mix cooked chicken with pesto , the chicken takes on a fragrant coating that carries herb and garlic into every bite. The texture becomes more cohesive, and the pesto oil helps keep the meat moist under the heat. A pitfall is overdressing the chicken which can make the flatbread greasy, so stick to the measured tablespoon.
Sprinkle parmesan cheese on top.: As the mozzarella cheese begins to melt it embraces the other toppings, and the cherry tomatoes soften and release a hint of sweet juice. Place items evenly to ensure each bite has balance, and you should see the cheese start to spread and become glossy before the chicken warms through. Crowding the toppings can prevent even melting, so spread ingredients with care.
Bake for 4-8 minutes or until cheese is melted and bubbly. Remove from oven.: The grated parmesan cheese forms little golden islands that add savory crunch and deepen the overall flavor. Visually, you will notice tiny brown spots as it melts, and the scent becomes nuttier and more intense. Overdoing parmesan can make the dish overly salty, so distribute it lightly.
Sprinkle with chopped basil and drizzle with a little bit of balsamic vinegar, if desired.: In the oven you will hear the faint pop of moisture from the cherry tomatoes , see the mozzarella cheese transform to glossy ribbons, and sense the crust browning at the edges. The timing can vary based on oven strength, so watch for bubbling cheese and a golden crust rather than counting minutes alone. A frequent error is leaving it too long which yields a dry cooked chicken and overly browned cheese, so pull it as soon as it looks inviting.
Sprinkle with chopped basil and drizzle with a little bit of balsamic vinegar, if desired.: The cool chopped basil releases a bright burst of herb aroma against the warm mozzarella cheese , and a light balsamic vinegar drizzle adds a balancing tang. You should notice an immediate lift in fragrance and taste. Do not add too much vinegar which can drown the delicate flavors and make the flatbread soggy; a light touch is best.