Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Peel the sweet potato and cut it into 1/2-inch cubes, then place them on one side of the prepared baking sheet.
Trim the broccoli into bite-sized florets and place them next to the sweet potatoes.
Pat the chicken breast dry with paper towels and place it on the other side of the pan.
Drizzle the olive oil over the chicken, sweet potatoes, and broccoli.
In a small bowl, whisk together the garlic powder, smoked paprika, dried oregano, sea salt, and black pepper.
Sprinkle the seasoning blend evenly over everything on the pan, tossing the vegetables to coat well.
Roast in the oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the sweet potatoes are tender.
Let the chicken rest for 5 minutes before slicing to ensure it stays juicy and flavorful.