Pat the cod fillets dry with a paper towel and season both sides evenly with sea salt and black pepper.
Heat a large non-stick skillet over medium-high heat and add 0.5 tbsp of ghee.
Add the asparagus spears and cherry tomatoes to the skillet, sautéing for 5-6 minutes until the asparagus is tender-crisp and tomatoes begin to blister.
Remove the vegetables from the pan and set aside on a warm plate.
In the same skillet, add the remaining 1 tbsp of ghee. Once shimmering, carefully place the cod fillets in the pan.
Sear the cod for 3-4 minutes on the first side without moving it, until a deep golden-brown crust forms.
Carefully flip the fish and cook for another 2-3 minutes until the flesh is opaque and flakes easily.
Reduce the heat to low, then stir in the lemon juice, lemon zest, and fresh parsley, spooning the melting herb butter over the fish for 1 minute.
Serve the golden cod immediately over a bed of warm quinoa with the sautéed vegetables on the side.