Preheat your oven to 375°F (190°C).
In a medium mixing bowl, combine the Parmesan cheese, mayonnaise, grated garlic, Dijon mustard, lemon juice, lemon zest, chives, hot sauce, Cajun seasoning, and half of the salt. Whisk everything together until it's smooth and well combined. Gently fold in the drained lump crab meat, being careful not to break up the crab too much. Set this delicious filling aside.
Prepare your salmon fillets. For each piece, carefully cut a slit down the center, creating a pocket in the thickest part. Make sure not to cut all the way through to the bottom. Brush the salmon all over with a little olive oil and sprinkle with the remaining salt and black pepper.
Line a baking sheet with aluminum foil and place a wire rack on top (this makes for easier cleanup and helps the salmon cook evenly). Place the prepared salmon fillets on the rack. Spoon a generous amount of the crab filling over each salmon fillet, making sure it's nestled nicely in the pocket you created.
Bake for 15-17 minutes, or until the salmon is flaky and cooked through. For moist, tender salmon, aim for an internal temperature of at least 120°F (49°C) when checked with a meat thermometer.
Serve immediately with an extra squeeze of fresh lemon juice over the top for a bright, zesty finish. Enjoy your elegant, healthy meal!