01 - Pat chicken breasts dry with paper towels. Season both sides generously with salt and black pepper, pressing the seasoning into the meat.
02 - Heat olive oil in a large skillet over medium-high heat until shimmering. Add chicken breasts and sear for 3–4 minutes per side until golden brown. Transfer chicken to a plate and set aside.
03 - In the same pan, add red onion and sauté for 2 minutes until slightly softened. Add garlic and cook for 30 seconds until fragrant, being careful not to burn it.
04 - Stir in cherry tomatoes and cook for 3–4 minutes until they start to release their juices and soften slightly.
05 - In a small bowl, whisk together balsamic vinegar, chicken broth, and honey until combined. Pour mixture into the pan, scraping up any browned bits from the bottom with a wooden spoon.
06 - Return the chicken breasts to the skillet, nestling them among the vegetables. Sprinkle with thyme and chopped basil. Reduce heat to low, cover, and simmer for 12–15 minutes until chicken is cooked through (internal temperature reaches 165°F).
07 - Remove lid and simmer uncovered for 2–3 minutes to allow the sauce to reduce and thicken slightly.
08 - Transfer chicken and vegetables to serving plates. Spoon the balsamic pan sauce over the top and garnish with additional fresh basil leaves.