01 -
Preheat grill to medium-high heat. Lightly oil the grill grates or use non-stick spray.
02 -
Combine Italian seasoning, garlic powder, onion powder, salt, and pepper. Season both sides of the chicken breasts evenly.
03 -
Place the seasoned chicken breasts on the preheated grill. Cook for approximately 6–7 minutes per side, or until nearly cooked through.
04 -
Top each chicken breast with a slice of mozzarella cheese. Close the grill lid; allow cheese to melt for 2–3 minutes.
05 -
Remove chicken from the grill. Arrange a tomato slice and fresh basil on top of each breast.
06 -
In a small saucepan, combine balsamic vinegar and light brown sugar. Simmer over medium heat for 10 minutes, stirring occasionally, until the mixture has reduced by half and is syrupy. Keep warm.
07 -
Drizzle the warm balsamic reduction over the assembled chicken. Serve immediately.