01 - Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper to prevent sticking and facilitate easy cleanup.
02 - Gently pat the salmon fillets dry with paper towels. This step is crucial for achieving a desirable texture. Arrange the dried fillets evenly on the prepared baking sheet.
03 - Lightly drizzle olive oil over each salmon fillet. Season thoroughly with sea salt and freshly ground black pepper. Place a thin lemon slice on top of each salmon portion.
04 - Transfer the baking sheet to the preheated oven and bake for 15 to 18 minutes, or until the salmon is opaque throughout and flakes effortlessly with a fork when tested.
05 - While the salmon is baking, prepare the dill sauce. In a medium mixing bowl, combine the sour cream, mayonnaise, freshly squeezed lemon juice, finely chopped fresh dill, Dijon mustard, and garlic powder. Season with salt and freshly ground black pepper to your preference. Whisk vigorously until the mixture is thoroughly combined and smooth.
06 - Carefully remove the baked salmon from the oven. Serve immediately, accompanied by a generous dollop of the creamy dill sauce either directly on the fillet or served on the side.