Preheat your oven to 400°F (200°C) and line a large rimmed sheet pan with parchment paper.
Cut the gold potato into uniform 1-inch cubes and trim the ends off the green beans.
In a small mixing bowl, whisk together the olive oil, lemon juice, minced garlic, dried oregano, dried thyme, sea salt, and black pepper.
Place the chicken breast, cubed potatoes, and green beans onto the prepared sheet pan.
Pour the lemon-herb mixture over the ingredients and toss thoroughly with your hands or tongs to ensure everything is evenly coated.
Spread the ingredients out into a single layer, ensuring the chicken is not covered by the vegetables.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender and golden.
Let the chicken rest for 5 minutes before slicing and serving alongside the roasted vegetables.