Preheat your oven to 400°F 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 roasting.
In a large mixing bowl, combine the chicken thighs, sweet potato cubes, and broccoli florets.
Drizzle the olive oil over the chicken and vegetables, then sprinkle with garlic powder, smoked paprika, sea salt, black pepper, and oregano.
Toss everything thoroughly with your hands or tongs until every piece is well-coated in oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, making sure the pieces are not touching to allow for proper browning.
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 sweet potatoes are tender.
Remove from the oven and let the chicken rest for 5 minutes before serving to keep the meat juicy.