01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - Pat the salmon fillets dry with paper towels and place them skin side down on the prepared baking sheet if skin-on.
03 - Combine olive oil, lemon juice, lemon zest, chopped dill, minced garlic, sea salt, and black pepper in a small bowl.
04 - Brush or spoon the marinade evenly over each salmon fillet.
05 - Place one lemon slice atop each fillet.
06 - Bake for 15 to 18 minutes, until the salmon flakes easily with a fork and is opaque in the center.
07 - Remove from oven, garnish with extra dill sprigs if desired, and serve immediately.