Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Peel the sweet potato and carrots, then chop them into uniform 1-inch cubes to ensure even roasting.
Slice the chicken breast into bite-sized pieces, approximately the same size as the vegetables.
In a large mixing bowl, combine the chicken, sweet potato, and carrots.
Drizzle with the extra virgin olive oil and sprinkle with dried rosemary, garlic powder, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated in oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, making sure the pieces are not overcrowded.
Roast for 25 to 30 minutes, tossing halfway through, until the chicken is cooked through and the vegetables are tender and slightly browned.