Get ready
Heat the broiler and place an oven rack about 6 inches below the heating element.
Marinate the tomatoes
Toss the cherry tomatoes with the olive oil, pesto, and balsamic glaze in a small bowl. Season with salt and black pepper, then set aside while you cook the chicken.
About 5 min
Cook the chicken
Heat the olive oil and butter in a large oven-safe skillet over medium-high heat. Season the chicken with salt and black pepper. Cook until golden and the center reaches 165°F, about 3 minutes per side.
About 6 min
Melt the cheese
Place one basil leaf and one slice of mozzarella on each cutlet. Broil until the mozzarella is melted and lightly bubbling, 2 to 3 minutes.
About 3 min
Finish and serve
Spoon the marinated tomatoes over and around the chicken, leaving some of the golden surface visible. Drizzle with more balsamic glaze, add fresh basil, and serve with toasted ciabatta.

