01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - Pat salmon fillets dry with paper towels and place skin-side down on the baking sheet.
03 - Drizzle olive oil over the fillets and season evenly with kosher salt and black pepper.
04 - Place one lemon slice atop each salmon fillet.
05 - Bake the fillets for 12 to 15 minutes until the salmon flakes easily with a fork and is cooked through.
06 - While baking, combine softened butter, chopped dill, lemon zest, minced garlic, and salt in a small bowl and mash until well blended.
07 - Remove baked salmon from the oven and immediately dollop with dill butter, allowing it to melt. Serve garnished with extra dill or lemon wedges if desired.