Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Mince the garlic cloves and finely chop the fresh rosemary and thyme leaves.
Peel the sweet potato if desired, then cut into 1-inch cubes; break the broccoli into bite-sized florets.
In a large mixing bowl, combine the chicken breast, sweet potato cubes, and broccoli florets.
Drizzle with extra virgin olive oil and add the minced garlic, chopped herbs, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated in the oil and aromatics.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the pieces aren't overcrowded.
Roast for 20 to 25 minutes, or until the chicken is cooked through to an internal temperature of 165°F and the sweet potatoes are tender.
Remove from the oven and let the chicken rest for 3 minutes before serving to keep it juicy.