Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Mince the garlic cloves finely and place them in a small bowl.
Whisk the extra virgin olive oil, minced garlic, rosemary, thyme, sea salt, and black pepper into the bowl to create a herb marinade.
Dice the sweet potato into 1-inch cubes and cut the broccoli into bite-sized florets.
Place the chicken breast, sweet potato cubes, and broccoli florets on the prepared baking sheet.
Drizzle the herb oil over everything, using your hands or a brush to ensure the chicken and vegetables are evenly coated.
Spread the ingredients into a single layer, ensuring the chicken has enough space to roast properly.
Bake for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the sweet potatoes are fork-tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.