Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Pat the chicken breast dry with paper towels and slice it into 1-inch thick strips or bite-sized pieces.
Place the sliced chicken, broccoli florets, and sliced red bell peppers onto the prepared sheet pan.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, dried oregano, garlic powder, sea salt, and black pepper.
Drizzle the lemon-herb mixture over the chicken and vegetables, then toss everything thoroughly to ensure an even coating of flavor.
Spread the ingredients out into a single layer across the pan, making sure not to overcrowd them so they roast rather than steam.
Bake for 18 to 22 minutes, or until the chicken is cooked through and the vegetables are tender with slightly caramelized edges.