Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Scrub the potato and carrots, then dice them into uniform 1-inch cubes to ensure even roasting.
In a large bowl, toss the diced vegetables with 0.5 teaspoon of olive oil, sea salt, and black pepper.
Spread the vegetables in a single layer on one side of the prepared baking sheet.
Mince the garlic clove and combine it in a small bowl with the remaining 0.5 teaspoon of olive oil, rosemary, and thyme.
Rub the herb and garlic mixture thoroughly over the chicken breast, then place it on the other side of the baking sheet.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are fork-tender.
Remove from the oven and squeeze fresh lemon juice over the chicken and vegetables to brighten the flavors before serving.