Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Prepare the vegetables by slicing the carrots into thin rounds and breaking the broccoli into bite-sized florets.
Mince the garlic cloves finely and set aside.
In a large mixing bowl, combine the chicken breast, broccoli, and carrots.
Drizzle with olive oil and sprinkle with minced garlic, rosemary, thyme, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated in the oil and seasonings.
Spread the mixture in a single layer on the prepared sheet pan, ensuring space between the pieces for even roasting.
Roast 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 serving to ensure it remains juicy.