Preheat your oven to 400°F (200°C).
In a small bowl, mix olive oil, lemon juice, minced garlic, salt, and pepper. Add chopped fresh thyme and rosemary.
Place the chicken breast on a baking sheet and brush generously with the lemon-herb mixture.
Halve or quarter the baby potatoes (depending on their size) and toss them with a drizzle of olive oil, salt, and pepper. Spread them out on the baking sheet.
Roast the chicken and potatoes in the oven for about 20-25 minutes, or until the chicken is cooked through and the potatoes turn crispy. If needed, stir the potatoes halfway through for even crisping.
While the chicken and potatoes are roasting, lightly steam or sauté the green beans until they are tender but still crisp.
Once cooked, plate the chicken alongside the crispy potatoes and green beans. Drizzle any remaining pan juices over the chicken for extra flavor.
Serve immediately and enjoy your balanced, flavor-packed meal.