INGREDIENTS
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1 1/4 pounds baking potatoes, peeled and cut into 2 1/2-by-1/3-inch sticks
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Vegetable oil, for frying
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1 1/2 cups all-purpose flour, plus more for dredging
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Kosher salt
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1 3/4 cups cold lager or pilsner
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1 3/4 pounds center-cut skinless cod or haddock fillet, cut into four 6-by-2-inch pieces
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Freshly ground pepper
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Malt vinegar, for serving
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Dilled Tartar Sauce, for serving (See Note)