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 and cook for 5-6 minutes per side until golden brown and internal temperature reaches 165°F. Transfer to a plate and cover loosely with foil to keep warm.
03 - In the same skillet, add remaining olive oil. Sauté minced garlic for 30 seconds until fragrant, being careful not to burn it.
04 - Add zucchini slices to the skillet and cook for 3-4 minutes, stirring occasionally, until just tender-crisp. Remove from heat and set aside with chicken.
05 - Add cherry tomatoes and red pepper flakes (if using) to the skillet. Cook for 2-3 minutes, stirring occasionally, until tomatoes begin to soften and release their juices.
06 - Return chicken and zucchini to the skillet, nestling the chicken among the vegetables. Arrange everything in an even layer.
07 - Top each chicken breast with sliced mozzarella. Cover the skillet with a lid and cook for 2-3 minutes until cheese is melted and bubbly.
08 - Remove from heat. Drizzle with balsamic glaze and sprinkle with torn fresh basil leaves. Serve immediately while hot.