Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Trim the woody ends off the asparagus, slice the zucchini into half-moons, and chop the red bell pepper into bite-sized pieces.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken breast and chopped vegetables on the prepared baking sheet, then drizzle the lemon-herb mixture over everything, tossing well to coat.
Spread the ingredients into a single layer, ensuring the chicken has enough space to roast evenly without steaming.
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.