Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel and dice the sweet potato into small half-inch cubes, and break the broccoli into bite-sized florets.
Mince the garlic cloves finely and strip the leaves from the rosemary and thyme stems, giving them a rough chop.
In a large mixing bowl, combine the chicken breast, sweet potato cubes, and broccoli florets.
Drizzle the olive oil over the mixture and add the minced garlic, fresh herbs, sea salt, and black pepper, tossing thoroughly to coat every piece.
Spread the ingredients in a single, even layer on the prepared baking sheet, ensuring the chicken isn't crowded by the vegetables.
Roast for 20 to 25 minutes until the chicken reaches an internal temperature of 165°F and the sweet potatoes are golden and tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it stays juicy and flavorful.