Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Peel and chop the carrots and parsnips into 1-inch thick rounds, and slice the red onion into thick wedges.
Mince the garlic cloves finely to ensure the flavor is evenly distributed across the chicken and vegetables.
Place the chicken breast, carrots, parsnips, and onions onto the prepared baking sheet.
Drizzle the extra virgin olive oil over everything and sprinkle with the minced garlic, rosemary, thyme, salt, and pepper.
Use your hands or tongs to toss the ingredients until everything is thoroughly coated in the oil and seasoning.
Arrange the chicken in the center and spread the vegetables in a single layer around it to ensure even roasting.
Roast in the oven for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are golden and tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.