Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Pat the cod fillets dry with paper towels to ensure the herb mixture adheres well and the fish bakes with a clean texture.
Trim the tough, woody ends off the asparagus spears and spread them out on one side of the prepared baking sheet.
In a small glass bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, dried parsley, garlic powder, sea salt, and black pepper.
Place the cod fillets on the other side of the baking sheet and brush the lemon-herb mixture generously over both the fish and the asparagus spears.
Bake for 12 to 15 minutes, or until the cod is opaque and flakes easily with a fork and the asparagus is bright green and crisp-tender.
While the fish bakes, warm your pre-cooked quinoa in a small saucepan or microwave.
Plate the cod and asparagus over the bed of fluffy quinoa and garnish with an extra squeeze of fresh lemon if desired.