Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, minced garlic, chopped parsley, chopped dill, sea salt, and black pepper until well combined.
Place the Alaskan cod fillet on one side of the baking sheet and arrange the trimmed asparagus spears on the other side in a single layer.
Drizzle half of the lemon-herb mixture over the cod fillet, spreading it with a brush or spoon to coat the top, then pour the remaining mixture over the asparagus and toss to coat.
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 vibrant and crisp-tender.
Transfer the fluffy cooked quinoa to a plate, top with the baked cod fillet, and serve the roasted asparagus alongside, drizzling any remaining juices from the pan over the fish.