01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly grease with cooking spray.
02 - In a small bowl, combine smoked paprika, garlic powder, onion powder, dried thyme, dried oregano, cayenne pepper, black pepper, and salt. Mix until thoroughly blended.
03 - Pat the salmon fillets dry with paper towels to remove excess moisture. Brush each fillet with olive oil on both sides.
04 - Generously coat the top of each salmon fillet with the Cajun seasoning mixture, pressing gently to ensure the spices adhere to the fish.
05 - Place the seasoned salmon fillets on the prepared baking sheet. Arrange lemon slices on top of or around the fillets for added flavor.
06 - Bake for 12-15 minutes, or until the salmon is opaque throughout and flakes easily when tested with a fork. The internal temperature should reach 145°F.
07 - Remove from the oven and garnish with freshly chopped parsley. Serve immediately while hot.