Pat the branzino fillets completely dry with a paper towel to ensure the skin gets ultra-crispy.
Season both sides of the fish fillets with the sea salt and black pepper.
Heat the extra virgin olive oil in a large stainless steel or cast iron skillet over medium-high heat until shimmering.
Place the fillets in the pan skin-side down, pressing gently with a spatula for 10 seconds to ensure even contact and prevent curling.
Sear for 3-4 minutes until the skin is golden and releases easily from the pan, then flip and cook for another 1-2 minutes until opaque.
While the fish cooks, steam the asparagus spears for 3-5 minutes until they are tender-crisp and bright green.
In a small bowl, whisk together the fresh lemon juice, lemon zest, minced garlic, and chopped parsley to create the sauce.
Plate the cooked quinoa and steamed asparagus, top with the seared branzino fillets, and spoon the lemon-herb sauce over the fish before serving.