Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the sweet potato and cut it into 1-inch cubes, then mince the garlic cloves and finely chop the fresh rosemary and thyme.
Place the chicken breast, sweet potato cubes, and broccoli florets into a large mixing bowl.
Drizzle the extra virgin olive oil over the ingredients and add the minced garlic, rosemary, thyme, sea salt, and black pepper.
Toss everything together until the chicken and vegetables are thoroughly and evenly coated with the oil and herbs.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the chicken pieces are not overcrowded.
Roast in the oven for 20 to 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 serving to ensure the meat remains juicy and succulent.