Start by combining the quartered tomatoes, minced garlic, and kosher salt in a small bowl. I usually let it chill in the fridge while I prepare the chicken so the flavors meld beautifully.
Heat the olive oil in a large skillet over medium heat. Season the chicken with salt and pepper, then cook for about 4-5 minutes on each side until golden and fully cooked. I make sure not to overcrowd the pan for even cooking.
Place a slice of mozzarella on each cooked chicken breast, then spoon some tomato topping over it. Drizzle generously with balsamic glaze and add a bit of pesto. I like to cover the skillet briefly so the cheese melts perfectly.