01 - Pat salmon fillets dry thoroughly with paper towels. Season both sides evenly with salt and pepper, emphasizing the skin side.
02 - Warm olive oil in a large non-stick or stainless steel skillet over medium-high heat until shimmering.
03 - Place salmon fillets skin-side down in the hot oil. Press gently with a spatula for 30 seconds to avoid curling.
04 - Allow fillets to cook undisturbed for 5 to 6 minutes, until skin is golden brown and salmon is mostly opaque.
05 - Turn fillets over and add butter to the pan. Cook for 1 to 2 minutes, occasionally spooning melted butter over the fish.
06 - In the last 30 seconds, drizzle lemon juice over fillets, then remove the pan from heat.
07 - Place salmon skin-side up on plates. Sprinkle with lemon zest and parsley, and serve immediately with lemon wedges.