Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, minced garlic, dried oregano, sea salt, and black pepper.
Slice the zucchini into half-moons, chop the red bell pepper into one-inch pieces, and trim the tough ends off the asparagus.
Place the chicken breast on one side of the sheet pan and arrange the zucchini, peppers, and asparagus on the other side.
Drizzle the lemon-herb marinade over both the chicken and the vegetables, using your hands or a brush to ensure everything is thoroughly 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.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it stays incredibly juicy and tender.