01 - Pat chicken breasts dry with paper towels. Season both sides generously with salt, freshly ground black pepper, and dried Italian herbs, pressing the seasoning into the meat to 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 tent with foil to keep warm.
03 - In the same skillet, add remaining tablespoon of olive oil. Add minced garlic and sauté for 30 seconds until fragrant, being careful not to burn it.
04 - Add sliced zucchini to the skillet and cook for 3-4 minutes, stirring occasionally, until just tender and beginning to develop golden spots.
05 - Add halved cherry tomatoes and red pepper flakes (if using). Cook for another 2-3 minutes, stirring gently, until tomatoes begin to soften and release their juices.
06 - Nestle the chicken breasts back into the skillet among the vegetables, arranging them in a single layer.
07 - Top each chicken breast with sliced mozzarella. Cover the skillet with a lid and cook for 2-3 minutes until the cheese is melted and bubbly.
08 - Remove from heat. Drizzle generously with balsamic glaze, sprinkle with torn fresh basil leaves, and serve immediately while hot.