01 - Set the oven to 400°F and prepare a baking sheet by lining it with parchment paper or lightly greasing it.
02 - In a small bowl, blend softened butter with chopped dill, lemon juice, lemon zest, minced garlic, salt, and black pepper until fully combined.
03 - Place salmon fillets skin side down on the prepared baking sheet.
04 - Evenly spread the lemon-dill butter over the top of each salmon fillet.
05 - Bake in the preheated oven for 15 to 18 minutes, until the salmon is opaque and flakes easily with a fork.
06 - Plate immediately and optionally garnish with lemon slices and additional dill sprigs.