01 - Pat chicken breasts dry with paper towels. Season both sides generously with salt, pepper, and Italian herbs, pressing the seasoning into the meat to ensure adherence.
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 internal temperature reaches 165°F. Transfer to a plate and tent with foil to keep warm.
03 - Add remaining olive oil to the same skillet. Add minced garlic and sauté for 30 seconds until fragrant, being careful not to burn.
04 - Add sliced zucchini to the skillet and cook for 3–4 minutes, stirring occasionally, until just tender and beginning to develop golden edges.
05 - Stir in cherry tomatoes and red pepper flakes if using. Cook for another 2–3 minutes until tomatoes start to soften and release their juices.
06 - Return chicken to the skillet, nestling it among the vegetables. Arrange fresh mozzarella slices over each chicken breast.
07 - Cover skillet and cook for 2–3 minutes until cheese is fully melted and bubbling. Remove from heat, drizzle with balsamic glaze, and sprinkle with torn basil leaves. Serve immediately.