Season both sides of the chicken breast evenly with the sea salt, black pepper, and dried oregano.
Heat a heavy-bottomed skillet over medium-high heat and add half of the extra virgin olive oil.
Place the chicken in the hot skillet and sear for 6 to 8 minutes per side until a golden-brown crust forms and the internal temperature reaches 165 degrees.
Transfer the chicken to a clean plate and let it rest for 5 minutes to lock in the juices.
In the same skillet, add the remaining oil and the asparagus spears, sautéing for about 4 minutes until they are bright green and crisp-tender.
Add the minced garlic to the skillet for the final 60 seconds of cooking, stirring constantly to prevent burning.
In a small glass bowl, whisk together the fresh lemon juice and chopped parsley to create a zesty finishing sauce.
Plate the fluffy cooked quinoa, top with the chicken and asparagus, and drizzle the lemon-herb sauce over the entire dish.