Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Scrub the Yukon Gold potato and carrots thoroughly, then dice the potato into 1-inch cubes and slice the carrots into half-moons.
In a small bowl, whisk together the olive oil, lemon juice, dried oregano, dried thyme, sea salt, and black pepper to create a bright marinade.
Place the chicken breast, diced potatoes, and carrots on the prepared baking sheet in a single layer.
Drizzle the lemon-herb mixture over the chicken and vegetables, tossing them gently to ensure everything is evenly coated.
Roast in the oven for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are fork-tender and lightly browned.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy and flavorful.