Preheat your oven to 425°F.
In a small bowl, combine lemon juice, minced garlic, chopped fresh herbs, salt, and pepper. Add olive oil and mix to create the marinade.
Coat the chicken breast with the marinade and allow it to sit for at least 15 minutes.
Meanwhile, prepare your vegetables. Toss the red bell pepper, zucchini, and red onion in a bit of olive oil, salt, and pepper, then spread them evenly on a baking sheet.
Place the marinated chicken breast on another baking sheet or in a small ovenproof dish.
Roast the vegetables in the oven for 20-25 minutes, stirring halfway through to ensure even cooking.
Bake the chicken breast for about 20-25 minutes, or until the internal temperature reaches 165°F and the exterior becomes slightly crispy.
While the chicken and vegetables roast, prepare the quinoa according to package instructions if not pre-cooked.
Assemble the bowl by layering quinoa, roasted vegetables, and sliced crispy lemon-herb chicken. Drizzle any remaining marinade over the bowl if desired.
Serve warm and enjoy your nutritious, flavorful meal.