Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Pat the chicken breast completely dry with a paper towel to ensure the skin or surface gets a proper sear in the oven.
In a small mixing bowl, whisk together 0.5 tablespoon of olive oil, the lemon juice, lemon zest, dried oregano, minced garlic, sea salt, and black pepper.
Place the chicken breast on one side of the prepared baking sheet and rub the lemon-herb mixture thoroughly over all sides.
Trim the woody ends off the asparagus and toss the spears with the remaining 0.5 tablespoon of olive oil and a tiny pinch of salt.
Arrange the asparagus in a single layer on the other side of the baking sheet.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender and slightly charred.
Allow the chicken to rest for 5 minutes before slicing it and serving over the warm, fluffy cooked quinoa.