Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into even 1-inch bite-sized pieces. Peel and slice the carrot into rounds, and chop the bell pepper into 1-inch squares.
Mince the garlic cloves finely.
In a large mixing bowl, combine the chicken, broccoli, carrots, and bell peppers.
Drizzle the olive oil over the mixture, then add the minced garlic, rosemary, 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 layer on the prepared baking sheet, ensuring nothing is overcrowded so it roasts rather than steams.
Bake for 20 to 25 minutes, or until the chicken is cooked through and the vegetables are tender with slightly caramelized edges.
Remove from the oven and let rest for 2 minutes before serving.