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 uniform 1/2-inch cubes to ensure even cooking.
Place the chicken breast, sweet potato cubes, and broccoli florets onto the prepared baking sheet in a single layer.
Drizzle the extra virgin olive oil over the chicken and vegetables.
In a small bowl, combine the dried rosemary, thyme, garlic powder, sea salt, and black pepper, then sprinkle the mixture evenly over everything.
Toss the vegetables with your hands or tongs to coat them thoroughly, and flip the chicken to season both sides.
Roast in the center of the oven for 20 to 25 minutes, or until the sweet potatoes are tender and the chicken reaches an internal temperature of 165°F.
Remove from the oven and allow the chicken to rest for 5 minutes before slicing to ensure it remains juicy.