Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Trim the woody ends off the asparagus and place the spears on one side of the baking sheet.
Pat the cod fillet dry with a paper towel and place it on the other side of the baking sheet.
In a small glass bowl, whisk together the extra virgin olive oil, fresh lemon juice, lemon zest, minced garlic, and dried oregano.
Drizzle the lemon-herb mixture evenly over both the cod fillet and the asparagus spears.
Season the fish and vegetables with sea salt and black pepper.
Bake in the center of the oven for 12 to 15 minutes, or until the cod is opaque and flakes easily with a fork and the asparagus is crisp-tender.
While the fish bakes, ensure your pre-cooked quinoa is warmed through.
Plate the meal by placing the fluffy quinoa on the bottom, topping it with the cod fillet and the roasted asparagus.
Garnish the entire dish with freshly chopped parsley and an extra squeeze of lemon if desired.