Set up your grill for indirect cooking/smoking and aim for a temperature of 250F. If you are using a Traeger grill then set the grill to 250F and use mild wood pellets such as apple.
Place a piece of tin foil on the side without heat. You'll put your fish filet's on the foil.
Combine the All Purpose Rub ingredients and mix well to combine.
Spread some olive oil across the filet, then sprinkle some all purpose rub.
Place the filet on the foil on your grill, away from the heat.
Add wood chips/chunks - I used apple and - and smoke for about 30 minutes, until the internal temp is around 145 and the fish flakes easily
Notes
This is a meaty fish that has a mild flavor. Go easy on the seasoning and the smoke levels so you will be able to taste the fish and not just the rub and smoke.