Prepare the Chicken. Start by preheating your oven to 375°F. Season the chicken breasts with salt and pepper on both sides. Place them in a baking dish and drizzle with olive oil.
Bake the Chicken. Bake the chicken breasts in the preheated oven for 25-30 minutes, or until the chicken is cooked through and no longer pink in the center.
Make the Bruschetta Topping. While the chicken is baking, prepare the bruschetta topping. In a bowl, combine diced tomatoes, chopped basil, minced garlic, balsamic vinegar, olive oil, salt, and pepper. Toss until well mixed.
Assemble the Dish. Once the chicken is baked, remove it from the oven and top each breast with a generous amount of the bruschetta mixture. If using mozzarella cheese, add a slice on top of each chicken breast.
Broil for Extra Flavor. Return the baking dish to the oven and broil for an additional 3-5 minutes, or until the cheese is melted and bubbly, and the bruschetta topping is slightly caramelized.
Garnish and Serve. Transfer the Chicken Bruschetta to a serving platter. Garnish with extra chopped basil and a drizzle of balsamic glaze for added flavor and presentation. Serve with a side of pasta or a fresh salad.