Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into 1-inch bite-sized pieces and place them on one side of the prepared sheet pan.
Add the broccoli florets, sliced red bell peppers, and diced zucchini to the other side of the pan.
In a small glass jar or bowl, whisk together the extra virgin olive oil, lemon juice, minced garlic, dried oregano, sea salt, and black pepper.
Drizzle the lemon-herb dressing over the chicken and vegetables, tossing everything well with your hands or tongs to ensure an even coating.
Roast in the oven for 18-20 minutes until the chicken is cooked through and the vegetables are tender with slightly charred, golden edges.
Divide the cooked quinoa into meal prep containers and top with the roasted chicken and vegetable mixture before sealing for the week.