01 - Pat chicken breasts thoroughly dry with paper towels. Season both sides generously with salt and black pepper, pressing gently to help it adhere.
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 deeply golden brown. Remove chicken from pan and set aside on a plate.
03 - Reduce heat to medium. Add red onion to the same pan and sauté for 2 minutes until slightly softened and translucent. 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, tossing occasionally, until they start to blister and release their juices.
05 - In a small bowl, whisk together balsamic vinegar, chicken broth, and honey until honey is fully dissolved. 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 lid and continue simmering uncovered for 2-3 minutes until sauce reduces and thickens slightly. The sauce should coat the back of a spoon.
08 - Transfer chicken to serving plates. Spoon pan sauce and vegetables over the top. Garnish with additional fresh basil leaves. Serve immediately.