Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel and cut the sweet potato into small 1/2-inch cubes and slice the chicken breast into uniform 1-inch pieces.
In a large mixing bowl, combine the chicken, sweet potato cubes, and broccoli florets.
Drizzle the olive oil over the mixture and sprinkle with garlic powder, smoked paprika, sea salt, black pepper, and finely chopped rosemary.
Toss everything together until the chicken and vegetables are evenly coated in oil and spices.
Spread the ingredients in a single layer on the prepared baking sheet, ensuring they are not overcrowded.
Roast for 22 to 25 minutes, tossing the medley halfway through, until the chicken is cooked through and the potatoes are golden and tender.