Preheat the oven to 400°F.
In a small bowl, combine lemon juice, olive oil, mixed herbs, salt, and pepper to create the marinade.
Place the chicken breast in a shallow dish and pour half of the marinade over it. Let it marinate for at least 15 minutes.
Chop the broccoli, halve the cherry tomatoes, and slice the zucchini. Toss the vegetables with the remaining marinade and a pinch of salt and pepper.
Arrange the marinated chicken and vegetables on a baking tray. Roast in the oven for 20-25 minutes, or until the chicken is cooked through and the vegetables are tender.
Meanwhile, prepare quinoa as per package directions if not already cooked.
Once done, slice the chicken and serve it over a bed of quinoa. Top with the roasted vegetables.
Enjoy your nutritious Lemon Herb Chicken and Roasted Vegetable Power Bowl!