Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Trim the tough, woody ends off the asparagus spears and arrange them on one side of the prepared baking sheet.
Pat the cod fillets completely dry with a paper towel and place them on the other side of the baking sheet.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, oregano, garlic powder, sea salt, and black pepper.
Drizzle the lemon-herb mixture evenly over both the cod fillets and the asparagus spears, using a brush to coat the fish thoroughly.
Bake in the center of the oven for 12 to 15 minutes, or until the cod is opaque throughout and flakes easily with a fork.
Place the warm cooked quinoa in a shallow bowl or on a plate as a base.
Top the quinoa with the baked cod and roasted asparagus, then garnish with fresh parsley before serving.