This Pesto Baked Chicken with Tomatoes is a flavorful and easy-to-make dish combining juicy chicken breasts marinated in pesto and Italian seasonings, baked with a medley of cherry tomatoes, shallots, and melty mozzarella cheese. The vibrant flavors of fresh basil and a touch of balsamic vinegar add brightness, making it a perfect weeknight dinner or a special meal to impress.