Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Rinse the dry quinoa in a fine-mesh strainer, then combine with 0.5 cup water in a small saucepan; bring to a boil, cover, and simmer for 15 minutes.
Place the cod fillets and trimmed asparagus spears on the prepared baking sheet.
In a small bowl, whisk together the melted ghee, olive oil, lemon juice, lemon zest, parsley, and garlic powder.
Drizzle the lemon-herb mixture over the cod and asparagus, then season both with sea salt and black pepper.
Bake for 12 to 15 minutes until the cod is opaque and flakes easily with a fork.
Fluff the cooked quinoa with a fork and serve it alongside the baked fish and vegetables.