Heat your skillet with a little oil, or preheat the grill. Add the fish (from frozen) right on the grill or skillet. DO NOT THAW the fish, you want to cook them from frozen.
Cook for 4 minutes on one side, flip and cook another 4 minutes on the other side.
Serve on a potato roll/slider bun layered with avocado, arugula and chipotle mayo.