Preheat oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Cube the sweet potato into 1-inch pieces and slice the carrots into half-inch rounds.
Place the chicken breast, sweet potato cubes, carrots, and broccoli florets onto the prepared baking sheet.
Drizzle the extra virgin olive oil over the chicken and vegetables.
Evenly sprinkle the dried rosemary, dried thyme, garlic powder, sea salt, and black pepper over all ingredients.
Toss the vegetables with your hands or tongs to ensure they are well-coated, and flip the chicken to season both sides.
Spread everything out in a single layer to ensure even roasting and browning.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are fork-tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.
Serve the sliced chicken alongside the roasted vegetable medley while hot.