01 - Preheat oven to 400°F and line a baking dish with parchment paper or lightly grease it.
02 - Place the salmon fillets evenly spaced in the prepared baking dish.
03 - Combine olive oil, lemon juice, lemon zest, sea salt, and black pepper in a small bowl, whisking until blended.
04 - Brush the marinade evenly over each salmon fillet to coat thoroughly.
05 - Sprinkle rinsed capers and chopped dill over the fillets, then top each with one or two thin lemon slices.
06 - Bake in the preheated oven for 15 to 18 minutes, or until salmon flakes easily with a fork and reaches 145°F internal temperature.
07 - Remove from oven, garnish with additional fresh dill, and serve immediately.