Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Trim the 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 the best texture, then place them on the other side of the sheet.
In a small bowl, whisk together the olive oil, lemon juice, lemon zest, minced garlic, and dried parsley.
Drizzle the lemon-herb mixture evenly over both the cod and the asparagus, tossing the asparagus gently to coat.
Season the cod and asparagus with the sea salt and black pepper.
Bake for 12-15 minutes, or until the cod is opaque and flakes easily with a fork and the asparagus is tender.
Serve the hot cod and asparagus over a bed of warm, fluffy quinoa.