Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Peel and dice the sweet potato into 1-inch cubes and slice the red bell pepper into thin strips.
Place the chicken breast, sweet potato cubes, broccoli florets, and bell pepper strips onto the prepared baking sheet.
Drizzle the extra virgin olive oil over the chicken and vegetables to ensure everything is lightly coated.
Sprinkle the dried rosemary, dried thyme, garlic powder, sea salt, and black pepper evenly over all the ingredients.
Toss the vegetables with your hands or a spatula to distribute the oil and spices, then rub the seasoning into both sides of the chicken.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are golden brown.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy, then serve alongside the roasted vegetables.