Preheat the oven to 400°F (200°C).
In a small bowl, combine lemon juice, olive oil, chopped fresh herbs, minced garlic, salt, and pepper to create a marinade.
Place the chicken breast in a baking dish and generously coat with the lemon-herb marinade. Let it marinate for 10-15 minutes if time allows.
On a baking sheet, arrange the broccoli, sliced red bell pepper, and chopped zucchini. Drizzle with a little olive oil, and season with salt and pepper.
Place both the chicken and vegetables in the oven. Roast the chicken for 20-25 minutes, or until it reaches an internal temperature of 165°F, and roast the vegetables for about 20 minutes until they are tender and slightly charred.
While the chicken and vegetables are roasting, prepare the quinoa according to package instructions if not already cooked.
Plate the dish by slicing the chicken breast, serving it alongside a portion of quinoa, and topping with the roasted vegetables.
Enjoy your balanced, flavor-packed dinner, perfect for nourishing your body and satisfying your taste buds.