Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the red potato, carrots, and parsnips into uniform 1-inch cubes to ensure even roasting throughout the pan.
In a large mixing bowl, whisk together 0.5 tablespoons of olive oil with half of the minced garlic, rosemary, thyme, salt, and pepper.
Add the chopped root vegetables to the bowl and toss thoroughly until every piece is glistening and well-coated with the herb mixture.
Pat the chicken breast dry with a paper towel, then rub with the remaining olive oil, garlic, and herbs until fully seasoned.
Arrange the vegetables in a single layer on the prepared baking sheet and nestle the chicken breast in the center of the tray.
Roast for 25 to 30 minutes until the chicken reaches an internal temperature of 165°F and the vegetables have developed caramelized edges.
Allow the chicken to rest for at least 5 minutes before slicing against the grain to ensure every bite remains juicy and flavorful.