Chop tomatoes, basil, and press garlic. Combine in a large mixing bowl with olive oil, balsamic, parmesan, salt, and pepper. Put in fridge.
Season chicken with salt, pepper, garlic powder, and cook using your preferred method (I like to air fry at 375 F for about 15 min), until the internal temp is around 160F.
Put chicken breasts in an oven safe pan or cast iron, top with ~2 tbsp bruschetta each (reserving some for additional finishing). Top each piece with ~3 slices fresh mozzarella, which should be patted dry to remove any moisture. Broil at 400F for ~5-7 minutes, until the cheese melts and chicken reaches 165F internal temp.
Top with additional bruschetta and a drizzle of balsamic glaze. Enjoy!