Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Slice the chicken breast into even 1-inch strips to ensure quick and uniform cooking.
Chop the broccoli into small florets, the red bell pepper into bite-sized pieces, and slice the zucchini into half-moons.
In a large mixing bowl, whisk together the extra virgin olive oil, fresh lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Add the chicken strips and all the prepared vegetables to the bowl, tossing thoroughly until every piece is coated in the fragrant herb marinade.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the ingredients are not overcrowded so they roast rather than steam.
Bake for 18-22 minutes, or until the chicken is cooked through and the vegetables are tender with slightly caramelized edges.
Remove from the oven and serve immediately while hot for the best flavor and texture.