Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the carrot and slice it into half-inch rounds, then cut the zucchini into thick half-moons.
Place the chicken breast, broccoli florets, carrot rounds, and zucchini on the prepared baking sheet.
Drizzle the olive oil over the chicken and vegetables, ensuring everything is lightly coated.
Evenly sprinkle the dried rosemary, thyme, garlic powder, sea salt, and black pepper over the entire tray.
Toss the vegetables with your hands or tongs and turn the chicken to ensure the seasoning is well-distributed.
Roast for 20 to 25 minutes until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly caramelized.
Let the chicken rest for 5 minutes before slicing against the grain to maintain maximum juiciness.