Soften a stick of butter in the microwave. Don’t melt it. Just enough that it retains it figure but can be mixed. Approximately 15-30 seconds in the microwave. Watch carefully.
Mix the Cajun seasoning with the butter in a small bowl.
Spread the butter mixture over the meat side of the fish.
Place the fish, skin side down on, the grill*. If you have a grill safe tray you can put your fish on that to keep the butter from dripping down and causing flare ups.
Close the grill and cook for around 10 minutes or until the fish is cooked thoroughly (white all the way through).
Remove from heat and set on a plate/tray.
Remove meat from the half shell. The meat should pull right from the skin easily.
You can keep the filets whole or pull them for more equal coverage on your sandwich.
Assemble your sandwiches. Enjoy!
Notes
*This only works for fish with bigger scales like a redfish, that will protect the meat from the flames.