01 - Preheat the oven to 400°F and line a baking sheet with parchment paper or lightly grease it.
02 - Pat salmon fillets dry and place skin-side down on the baking sheet.
03 - Drizzle olive oil over fillets and season evenly with kosher salt and black pepper. Top each with a lemon slice.
04 - Bake in the preheated oven for 12 to 15 minutes until just cooked through and flakes easily with a fork.
05 - While baking, combine softened butter, fresh dill, lemon zest, minced garlic, and salt in a small bowl. Mash until blended.
06 - Remove salmon from oven and immediately top each fillet with a generous dollop of dill butter, allowing it to melt over the hot fish.
07 - Serve immediately, garnished with additional dill or lemon wedges as desired.