Preheat oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Chop the chicken breast into 1-inch bite-sized pieces.
Prepare the vegetables by cubing the sweet potato, slicing the carrots, and halving the Brussels sprouts.
In a large mixing bowl, combine the chicken and vegetables.
Drizzle with olive oil and sprinkle with turmeric, rosemary, thyme, garlic powder, sea salt, and black pepper.
Toss everything together until evenly coated in the golden spice mixture.
Spread the mixture in a single layer on the prepared baking sheet, ensuring space between pieces for roasting.
Roast for 20-25 minutes, tossing halfway through, until the chicken is cooked through and the vegetables are tender and browned.