Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Dice the sweet potato into 1/2-inch cubes and slice the carrots into 1/4-inch thick rounds.
Cut the chicken breast into bite-sized 1-inch pieces.
In a large mixing bowl, combine the chicken, sweet potatoes, and carrots.
Drizzle with olive oil and sprinkle with sea salt, black pepper, dried rosemary, and garlic powder.
Toss everything together until the chicken and vegetables are evenly coated with oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, ensuring enough space for even roasting.
Roast in the oven for 20-25 minutes, or until the chicken is cooked through and the vegetables are tender and slightly caramelized.
Serve immediately while hot and fragrant.