Preheat your oven to 425°F.
In a small bowl, whisk together balsamic vinegar, honey, minced garlic, dried thyme, dried rosemary, and a pinch of salt and pepper.
Pat the chicken breast dry and season with salt and pepper on both sides.
Heat half of the olive oil in an oven-safe skillet over medium-high heat. Sear the chicken breast for 2-3 minutes on each side until golden brown.
While the chicken sears, chop the red bell pepper into strips, slice the zucchini, and cut the red onion into wedges.
Toss the vegetables in a bowl with the remaining olive oil, a little salt, and pepper.
Once the chicken is seared, drizzle the balsamic glaze over it and add the vegetables around the chicken in the skillet.
Transfer the skillet to the preheated oven and roast for 15-18 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender.
Remove from oven and let the chicken rest for a few minutes before serving with the roasted vegetables.