Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel and dice the sweet potato into 1/2-inch cubes, chop the bell pepper into bite-sized pieces, and mince the garlic cloves.
In a small bowl, whisk together the olive oil, minced garlic, chopped rosemary, thyme, sea salt, and black pepper.
Place the chicken breast on one side of the baking sheet and arrange the sweet potatoes, broccoli, and bell peppers on the other side.
Drizzle the garlic-herb oil mixture over the chicken and the vegetables, tossing the vegetables to ensure they are evenly coated.
Roast in the oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the sweet potatoes are tender.
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 vegetables and serve immediately.