Preheat your oven to 400°F (200°C).
Trim the woody ends off the asparagus and place them on a parchment-lined baking sheet.
Drizzle the asparagus with 0.5 tbsp of olive oil and season with a pinch of sea salt and black pepper.
Pat the chicken breast dry with a paper towel and season both sides with dried oregano, lemon zest, and the remaining sea salt and black pepper.
Heat the remaining 0.5 tbsp of olive oil in an oven-safe skillet over medium-high heat.
Place the chicken in the skillet and sear for 3-4 minutes until a golden-brown crust forms.
Flip the chicken, add the minced garlic to the pan, and transfer the skillet to the oven.
Place the asparagus tray in the oven at the same time and roast everything for 10-12 minutes.
Ensure the chicken reaches an internal temperature of 165°F and the asparagus is tender and slightly charred.
Remove from the oven, drizzle the fresh lemon juice over the chicken, and serve immediately over the warm cooked quinoa.