01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or lightly grease the surface.
02 - Pat salmon fillets dry using paper towels. Rub both sides with olive oil, then season evenly with kosher salt and black pepper.
03 - Place salmon fillets on the prepared baking sheet, spacing them evenly to ensure uniform cooking.
04 - Bake for 12 to 15 minutes until salmon is cooked through and flakes easily with a fork.
05 - While salmon bakes, combine sour cream or Greek yogurt, fresh dill, lemon juice, lemon zest, minced garlic, Dijon mustard, salt, and black pepper in a small bowl. Whisk until smooth and well combined.
06 - Remove salmon from oven and transfer fillets to serving plates. Spoon the dill and lemon sauce generously over each fillet.
07 - Garnish with lemon slices and additional fresh dill if desired. Serve immediately while salmon is warm.