Preheat the oven to 375°F (190°C).

Prepare the chicken: Rub the chicken breasts with olive oil and season both sides with garlic powder, oregano, salt, and black pepper.

Cook the chicken: Heat a large oven-safe skillet over medium-high heat. Add the chicken and cook for 4-5 minutes on each side until browned.

Prepare the bruschetta topping: While the chicken is cooking, in a bowl, mix together the diced cherry tomatoes, chopped basil, balsamic vinegar, and a pinch of salt and pepper.

Add the topping: Once the chicken is browned, spoon the bruschetta mixture over the chicken breasts. Sprinkle Parmesan cheese over the top, then add shredded mozzarella.

Bake the chicken: Transfer the skillet to the oven and bake for 15-20 minutes, or until the chicken reaches an internal temperature of 165°F (75°C) and the cheese is melted and bubbly.

Serve: Remove from the oven and garnish with additional fresh basil if desired. Serve hot.