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 1-inch cubes, then chop the broccoli into bite-sized florets.
Pat the chicken thighs dry with a paper towel to ensure they brown beautifully in the oven.
In a large mixing bowl, combine the chicken, sweet potato cubes, and broccoli florets.
Drizzle with olive oil and sprinkle with smoked paprika, garlic powder, sea salt, and black pepper.
Toss everything thoroughly until the ingredients are evenly coated in the oil and spices.
Spread the mixture onto the prepared baking sheet in a single layer, ensuring the chicken pieces are not crowded.
Roast for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender.
Remove from the oven and garnish with finely chopped fresh rosemary before serving hot.