Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Trim the tough, woody ends off the asparagus spears and place them on one side of the prepared baking sheet.
Pat the cod fillets dry with a paper towel to ensure a better texture and place them on the other side of the baking sheet.
In a small bowl, whisk together the olive oil, lemon juice, lemon zest, dried parsley, garlic powder, sea salt, and black pepper.
Drizzle the herb and oil mixture evenly over both the cod fillets and the asparagus spears, tossing the asparagus slightly to ensure full coverage.
Bake in the center of the oven for 12 to 15 minutes, or until the cod is opaque and flakes easily with a fork.
Arrange the roasted cod and asparagus over a bed of warm, fluffy quinoa and serve immediately with an extra squeeze of fresh lemon if desired.