Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the carrots and parsnips, then chop them into uniform 1-inch thick rounds or bite-sized chunks to ensure even roasting.
In a large mixing bowl, combine the chopped vegetables and the turkey breast with olive oil, minced garlic, rosemary, thyme, salt, and pepper.
Toss the ingredients thoroughly until the turkey and vegetables are well-coated with the oil and aromatics.
Spread the mixture onto the prepared baking sheet in a single layer, placing the turkey breast in the center surrounded by the root vegetables.
Roast for 25 to 30 minutes until the turkey reaches an internal temperature of 165°F and the vegetables are golden and tender.
Remove from the oven and let the turkey rest for 5 minutes before slicing to keep it juicy, then serve alongside the roasted vegetables.