01 - Preheat your 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 on the prepared baking sheet, skin-side down if applicable.
03 - In a small bowl, mix together the olive oil, Cajun seasoning, smoked paprika, garlic powder, salt, black pepper, lime zest, and lime juice.
04 - Brush or spoon the spice mixture evenly over each salmon fillet.
05 - Top each fillet with a slice of lime.
06 - Bake for 12–15 minutes, or until the salmon flakes easily with a fork and is just opaque in the center.
07 - Remove from the oven, garnish with fresh cilantro or parsley if desired, and serve immediately.