01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - Pat the salmon fillets dry and place them on the prepared baking sheet. Drizzle olive oil over the fillets and season both sides with salt and black pepper.
03 - In a small bowl, stir together melted butter, minced garlic, lemon juice, and lemon zest. Spoon the mixture evenly over the salmon fillets.
04 - Bake for 14 to 18 minutes, or until the salmon is cooked through and flaky, reaching an internal temperature of 145°F.
05 - While the salmon bakes, mix sour cream, mayonnaise, chopped dill, lemon juice, Dijon mustard, salt, and pepper in a small bowl. Adjust seasoning as needed.
06 - Plate the baked salmon fillets and generously spoon the dill sauce on top. Serve immediately.