Classic Fish and Chips
Meanwhile, whisk flour and 1/2 cup water in medium bowl until smooth batter forms. Sprinkle fish with salt and pepper. Add fish to batter and stir to coat. Add potato to skillet; fry until golden brown and crisp, stirring often, about 7 minutes.
Using tongs, transfer potato to paper towels. Sprinkle with salt and pepper. Add fish to skillet; fry until coating is golden and crisp and fish is just opaque in center, about 3 minutes per side.
Transfer fish to paper towels. Sprinkle with salt and pepper. Serve with vinegar.