Prep the bruschetta topping: In a medium bowl, combine tomatoes, garlic, red onion, basil, olive oil, balsamic vinegar, salt, and pepper. Stir gently. Taste and adjust seasoning.
Let it sit while you cook the chicken so the flavors meld.
Season the chicken: Pat the chicken breasts dry with paper towels. In a small bowl, mix salt, pepper, garlic powder, Italian seasoning, and smoked paprika if using. Rub the olive oil over the chicken, then coat with the seasoning blend.
Cook on the stovetop: Heat a large skillet over medium-high.
When hot, add the chicken and cook 5–6 minutes per side, or until the internal temperature reaches 165°F (74°C). If the breasts are thick, reduce heat to medium and cover for 2–3 minutes to finish cooking without drying out.
Alternative oven method: Preheat to 425°F (220°C). Sear the chicken in a hot skillet 2 minutes per side for color, then transfer to the oven for 10–12 minutes, or until it reaches 165°F.
Rest the chicken: Transfer cooked chicken to a plate and rest for 5 minutes.
This helps keep it juicy.
Top and finish: Spoon the tomato-basil mixture over each chicken breast. If adding cheese, sprinkle it on now so it softens from the residual heat. Finish with a light drizzle of balsamic glaze and extra basil.
Serve with arugula or your favorite sides.