Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
Peel the carrots and parsnips, then slice them into 1/2-inch thick rounds.
Dice the chicken breast into 1-inch cubes to ensure they cook evenly with the vegetables.
In a mixing bowl, combine the sliced vegetables, chicken cubes, and minced garlic.
Drizzle with olive oil and sprinkle with dried rosemary, dried thyme, sea salt, and black pepper.
Toss everything together until the chicken and vegetables are thoroughly coated in the oil and herbs.
Spread the mixture in a single layer on the prepared baking sheet, ensuring no pieces are overlapping.
Roast for 20-25 minutes, tossing halfway through, until the vegetables are tender and the chicken is fully cooked.
Serve immediately while the vegetables are hot and the edges are caramelized.