Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Trim the woody ends off the asparagus and mince the garlic cloves.
In a small bowl, whisk together the extra virgin olive oil, the juice of half a lemon, minced garlic, dried oregano, sea salt, and black pepper.
Place the chicken breast and asparagus on the prepared baking sheet.
Drizzle the lemon-herb oil mixture over the chicken and asparagus, tossing the vegetables and brushing the chicken to ensure everything is evenly coated.
Place the remaining lemon half, sliced into rounds, on top of the chicken for extra flavor.
Roast in the oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender and slightly browned.
Let the chicken rest for 5 minutes before slicing and serving alongside the roasted asparagus.