01 - Preheat your grill or a grill pan to medium-high heat.
02 - Pat chicken breasts dry. Drizzle with olive oil and season with Italian seasoning, salt, and black pepper on both sides.
03 - Grill chicken for 6-8 minutes per side, or until fully cooked and juices run clear (internal temperature should reach 165°F). Remove from heat and let rest 5 minutes.
04 - While the chicken cooks, prepare the bruschetta topping: In a medium bowl, combine diced tomatoes, basil, minced garlic, balsamic vinegar, salt, and pepper. Mix well and let sit for at least 10 minutes to allow flavors to meld.
05 - Spoon the bruschetta topping generously over each chicken breast. Garnish with Parmesan and extra basil if desired.
06 - Serve immediately, with a side of salad or crusty bread if not gluten-free.