01 - Preheat the oven to 400°F and line a baking sheet with parchment paper or grease it lightly.
02 - Arrange the salmon fillets on the prepared baking sheet. Drizzle with olive oil, then season evenly with salt and black pepper. Top each fillet with a lemon slice.
03 - Bake for 12 to 15 minutes until the salmon flakes easily with a fork and reaches an internal temperature of 145°F.
04 - While the salmon cooks, whisk together sour cream or Greek yogurt, mayonnaise, lemon juice, lemon zest, dill, garlic, salt, and pepper in a small bowl until smooth.
05 - Remove the salmon from the oven, plate the fillets, and spoon the lemon dill sauce over the top or serve alongside. Garnish optionally with additional dill or lemon wedges.