01 - Pat chicken breasts thoroughly 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 deep golden brown. Remove chicken from pan and set aside on a plate.
03 - In the same pan, add sliced red onion and sauté for 2 minutes until slightly softened and translucent. Add minced garlic and cook for 30 seconds until fragrant, being careful not to burn.
04 - Stir in halved cherry tomatoes and cook for 3-4 minutes until they start to blister and release their juices, creating a light sauce in the pan.
05 - In a small bowl, whisk together balsamic vinegar, chicken broth, and honey until fully combined. Pour mixture into the pan, using a wooden spoon to scrape 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 reaches 165°F).
07 - Remove the lid and continue simmering uncovered for 2-3 minutes to allow the sauce to reduce and thicken slightly. The sauce should coat the back of a spoon.
08 - Transfer chicken to serving plates and spoon the pan sauce with vegetables over the top. Garnish with additional fresh basil leaves.