01 - Pat chicken breasts dry with paper towels and season both sides generously with salt and black pepper.
02 - Heat olive oil in a large skillet over medium-high heat. Add chicken breasts and sear for 3-4 minutes per side until golden brown. Remove chicken from pan and set aside.
03 - Add red onion to the same pan and sauté for 2 minutes until slightly softened. Add garlic and cook for 30 seconds until fragrant.
04 - Stir in cherry tomatoes and cook for 3-4 minutes until they start to release juices and soften.
05 - Whisk together balsamic vinegar, chicken broth, and honey in a small bowl. Pour mixture into the pan, scraping up any browned bits from the bottom.
06 - Return 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 165°F).
07 - Remove lid and simmer uncovered for 2-3 minutes to allow the sauce to reduce and thicken slightly.
08 - Transfer chicken to serving plates, spoon the pan sauce and vegetables over the top, and garnish with additional fresh basil leaves.