Preheat oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Mince the garlic cloves and finely chop the fresh parsley and dill.
In a small bowl, whisk together 1 teaspoon of olive oil, lemon juice, lemon zest, minced garlic, parsley, and dill to create the marinade.
Place the cod fillets on one side of the prepared baking sheet and pat them dry with a paper towel.
Arrange the asparagus spears on the other side of the sheet, ensuring they are in a single layer.
Drizzle the remaining 1 teaspoon of olive oil over the asparagus and season with half of the sea salt and black pepper.
Spread the lemon-herb mixture evenly over the top of the cod fillets and season with the remaining salt and pepper.
Bake for 12-15 minutes until the cod is opaque and flakes easily with a fork and the asparagus is tender.
Serve the baked cod and roasted asparagus alongside the warm cooked quinoa for a nutrient-dense meal.