Prep Time 15 minutes mins
Cook Time 12 minutes mins
Resting Time 5 minutes mins
Total Time 32 minutes mins
Choose thin, evenly sized chicken breasts for faster, more uniform cooking; if they are thick, butterfly or pound them to 1/2-inch. Toast the bread until just golden so it stays crisp under the juicy toppings, and add the tomato mixture right before serving to avoid sogginess. Homemade or high-quality refrigerated pesto delivers brighter flavor; if using jarred pesto, stir in a squeeze of lemon for freshness. For a crowd, keep toasted bread warm in a low oven and set up a topping station. You can substitute mozzarella for Parmesan, use rotisserie chicken for speed, or grill the bread for extra smokiness.