Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Slice the red bell pepper into one-inch strips and ensure the broccoli is cut into bite-sized florets.
In a small mixing bowl, whisk together the extra virgin olive oil, fresh lemon juice, lemon zest, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken breast on one side of the sheet pan and the broccoli and peppers on the other side.
Drizzle the lemon-herb marinade over both the chicken and the vegetables, tossing the vegetables and flipping the chicken to ensure everything is evenly coated.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly charred.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.
Divide into meal prep containers or serve immediately for a clean, high-protein meal.