Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Wash and dice the red potato, carrots, and parsnips into uniform 1-inch cubes to ensure even roasting.
Mince the garlic cloves and finely chop the fresh rosemary and thyme leaves.
In a large mixing bowl, toss the diced root vegetables with 0.5 tablespoon of olive oil, half of the minced garlic, and half of the fresh herbs.
Pat the chicken breast dry with a paper towel, then rub with the remaining 0.25 tablespoon of olive oil, garlic, herbs, sea salt, and black pepper.
Spread the seasoned vegetables in a single layer on the prepared baking sheet, leaving space in the center for the chicken.
Place the chicken breast in the center of the sheet and roast for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are golden and tender.
Let the chicken rest for 5 minutes before slicing to keep it juicy, then serve alongside the roasted vegetables.