Prepare the Fish: Rinse the mackerel fillets under cold water and pat them dry with paper towels. This helps achieve a nice sear when cooking.
Seasoning: In a bowl, combine the lemon juice, lemon zest, minced garlic, olive oil, salt, and pepper. Mix well. From my own personal experience, letting the mackerel marinate in this mixture for about 5-10 minutes enhances the flavor.
Heat the Skillet: Heat a skillet over medium heat and add a tablespoon of olive oil. Ensure the skillet is hot before adding the fish.
Cooking the Fish: Place the mackerel fillets skin-side down in the skillet. Cook for about 4-5 minutes until the skin is crispy. Gently flip the fillets using a fish spatula and cook for another 3-4 minutes until the flesh is opaque and flakes easily.
Serving: Once cooked, transfer the mackerel to a plate. Drizzle the remaining lemon-garlic mixture from the skillet over the fish. Garnish with fresh parsley for a pop of color.
Time to Stand: Allow the dish to sit for about 5 minutes before serving. This gives the flavors a chance to meld together beautifully.