01 - Preheat the oven to 400°F. Line a baking tray with parchment paper.
02 - Pat salmon fillets dry with paper towels. Place them skin-side down on the prepared tray. Brush each fillet with olive oil and season lightly with salt and black pepper.
03 - Bake salmon for 15–18 minutes, or until opaque and flakes easily with a fork.
04 - While salmon bakes, prepare the sauce: In a small bowl, combine dill, lemon zest, lemon juice, butter, Greek yogurt, garlic, Dijon mustard, salt, and pepper. Mix until smooth and creamy.
05 - Remove salmon from the oven. Spoon the dill and lemon sauce over each fillet. Garnish with additional fresh dill and lemon slices, if desired. Serve immediately.