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 seasoning adheres properly.
In a small bowl, combine the dried oregano, garlic powder, sea salt, and black pepper.
Season the chicken breast on both sides with the herb mixture and place it on the baking sheet.
Trim the tough ends from the asparagus and toss the spears with half of the olive oil and a pinch of salt.
Arrange the asparagus on the baking sheet next to the chicken in a single layer.
Roast for 18 to 22 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender.
While roasting, whisk together the remaining olive oil, fresh lemon juice, and lemon zest in a small bowl.
Once cooked, slice the chicken and serve it alongside the asparagus over the warm, fluffy quinoa.
Drizzle the lemon-herb dressing over the entire plate before serving.