Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Mince the garlic cloves, slice the carrot into 1/4-inch thick rounds, and chop the red bell pepper into bite-sized pieces.
Place the chicken breast, broccoli florets, sliced carrots, and bell peppers into a large mixing bowl.
Drizzle the olive oil over the chicken and vegetables, then sprinkle with minced garlic, dried rosemary, dried thyme, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated with the oil and seasonings.
Spread the mixture in a single, even layer on the prepared baking sheet, ensuring the chicken is not covered by the vegetables.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and lightly browned.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy. Serve immediately.