Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Peel and chop the sweet potato and carrots into 1-inch cubes, and cut the broccoli into bite-sized florets.
Finely mince the garlic cloves.
In a large mixing bowl, combine the chicken breast, cubed sweet potato, carrots, and broccoli florets.
Drizzle the olive oil over the chicken and vegetables, then 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 spices.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the chicken pieces are not overcrowded.
Roast for 20-25 minutes, or until the chicken is cooked through to an internal temperature of 165°F and the vegetables are tender and golden-brown.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.
Plate the sliced chicken alongside the roasted root vegetables and broccoli for a complete, clean meal.