Lay fillet on cutting board. Preheat oven to 400 degrees F.
In a bowl mix dry rub mixture. Break up any clumps of brown sugar.
Sprinkle it on top of your fish and gently press down. Lift up and allow excess to fall off.
Cover baking sheet with non stick foil. Lay fillet on top.
Bake for 8-10 minutes. (thick fillets I bake for 10)Then switch to broil hi for 2 minutes to crisp the top just a bit. (just a tip: check to see how well done your fish is in the center already, if it's already as done as you'd like it I would skip broil step)
Allow to rest on baking sheet for 5 minutes before cutting into pieces and serving.