Prepare the fish by cutting it into filets, patting dry with paper towel, and sprinkling each side with salt.
Heat oil in a deep fryer to 350°F.
In a medium mixing bowl, combine beer batter ingredients and mix well.
Dip each fish filet into the batter and carefully place it into the oil.
Allow the fish to cook for about 2 minutes per side, rolling the fish halfway through cooking so that both sides are a nice golden brown color. Each piece of fish will take about 5 minutes to cook and may need to be cooked in batches, depending on the size of your deep fryer.
Place cooked filets onto a sheet on paper towel to soak up any excess oil.
Build each fish burger by adding coleslaw and tartar sauce to the fish on a brioche bun.
Serve with fries or ripple chips.