Prepare the Chicken: Pat the chicken dry and season with Italian seasoning, salt, onion powder, garlic powder, and black pepper. Drizzle with olive oil to coat evenly.
Grill the Chicken: Heat a grill or grill pan over medium-high heat. Cook the chicken for 5-6 minutes per side, until it reaches an internal temperature of 165°F (75°C). Let it rest for 5 minutes.
Make the Bruschetta Topping: In a bowl, combine the diced tomatoes, salt, minced garlic, extra virgin olive oil, balsamic vinegar, and basil. Stir gently and season with ground black pepper to taste.
Assemble & Serve: Spoon the bruschetta topping over the grilled chicken and drizzle with balsamic glaze if desired. Serve immediately.