01 - Pat chicken breasts dry with paper towels. Season both sides generously with salt, black pepper, and Italian herbs, pressing gently to help the seasoning adhere.
02 - Heat 1 tablespoon olive oil in a large skillet over medium-high heat until shimmering. Add chicken breasts and cook for 5–6 minutes per side until golden brown and cooked through (internal temperature reaches 165°F). Transfer to a plate and cover loosely with foil to keep warm.
03 - Add remaining tablespoon of olive oil to the same skillet. Reduce heat to medium and sauté minced garlic for 30 seconds until fragrant, being careful not to burn it.
04 - Add zucchini rounds to the skillet and cook for 3–4 minutes, stirring occasionally, until just tender-crisp. Avoid overcooking to maintain texture.
05 - Stir in cherry tomatoes and red pepper flakes if using. Continue cooking for 2–3 minutes until tomatoes begin to soften and release their juices.
06 - Return chicken to the skillet, nestling it among the vegetables. Arrange mozzarella slices generously over each chicken breast.
07 - Cover the skillet with a lid and cook for 2–3 minutes until cheese is melted and bubbly. Remove from heat, drizzle with balsamic glaze, and scatter fresh basil leaves over the top. Serve immediately while hot.