INGREDIENTS
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Vegetable oil, for deep frying
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3 large russet potatoes
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2 cups rice flour
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1 tablespoon baking powder
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3 teaspoons salt, plus more for seasoning
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1/2 teaspoon freshly ground black pepper, plus more for seasoning
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1 (12-ounce) can soda water
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1 large egg, lightly beaten
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2 (8-ounce) cod or haddock fillets, cut in 1/2 on an angle
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1/2 cup rice flour, for dredging
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Malt vinegar, for serving