Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Pat the chicken breast dry with a paper towel to ensure the surface gets perfectly crispy during roasting.
In a small bowl, whisk together the olive oil, lemon juice, dried oregano, dried thyme, garlic powder, sea salt, and black pepper.
Slice the zucchini into rounds, chop the red bell pepper into bite-sized pieces, and trim the woody ends off the asparagus spears.
Place the chicken and vegetables on the prepared baking sheet, then drizzle the lemon-herb marinade over everything, tossing well to coat.
Roast for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly caramelized.
Let the chicken rest for 5 minutes before slicing to keep it juicy, then serve alongside the roasted vegetables.