01 - Set the oven to 400°F and line a baking tray with parchment paper or lightly grease it.
02 - Pat the salmon fillets dry using paper towels and arrange them skin-side down on the prepared tray.
03 - Combine olive oil, Cajun seasoning, salt, and black pepper in a small bowl; evenly brush or rub this mixture over the salmon fillets.
04 - Squeeze the juice of one lime evenly over the seasoned salmon fillets.
05 - Bake in the preheated oven for 12 to 15 minutes until the salmon flakes easily with a fork and is just opaque at the center.
06 - Top with lime slices and chopped cilantro or parsley before serving.