Combine the white rice flour, nutritional yeast, cornstarch, garlic powder, salt, and pepper in a bowl. Once mixed, spread it out on a plate.
Whisk together the egg and water.
Dip each filet in the egg wash then in the rice flour mixture to coat.
Heat the olive oil over medium high heat in a large cast iron skillet.
Cook the filets two at a time (or more if you can fit them!) for 3-4 minutes on each side, or until golden brown. Transfer to a paper towel lined plate to drain. Serve on top of mixed wild rice.