Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Pat the cod fillet dry with a paper towel and place it on one side of the prepared baking sheet.
In a small mixing bowl, whisk together half of the olive oil, minced garlic, lemon zest, lemon juice, parsley, oregano, sea salt, and black pepper.
Spread the herb and lemon mixture evenly over the top of the cod fillet, pressing slightly so it adheres.
Trim the woody ends off the asparagus and place the spears on the other side of the baking sheet.
Drizzle the remaining olive oil over the asparagus and toss with a tiny pinch of salt and pepper.
Bake for 12-15 minutes, or until the cod is opaque and flakes easily with a fork and the asparagus is crisp-tender.
Fluff the pre-cooked quinoa and serve the baked cod and asparagus directly over the warm grains.