Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Wash and halve the baby potatoes, and trim the ends of the green beans.
In a small bowl, whisk together the extra virgin olive oil, juice and zest of the half lemon, minced garlic, rosemary, thyme, sea salt, and black pepper.
Place the chicken breast, halved potatoes, and green beans onto the prepared sheet pan.
Drizzle the lemon-herb oil mixture over the chicken and vegetables, tossing everything thoroughly to ensure an even coating.
Arrange the ingredients in a single layer, ensuring the chicken is not covered by vegetables to allow the skin to crisp.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are golden-brown and tender.
Let the chicken rest for 5 minutes before slicing and serving alongside the roasted vegetables.