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1
Blend all ingredients in a food processor until mixture just begins to form a ball.
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2
Knead dough on a lightly floured surface, incorporating only as much additional flour as necessary to keep dough from sticking, until smooth and elastic, 6 to 8 minutes.
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3
Wrap dough in plastic wrap and let stand 1 hour.
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4
Set smooth rollers of pasta machine at widest setting.
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5
Cut dough into 4 pieces and keep 3 pieces covered.
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6
Flatten unwrapped piece of dough into a rectangle and feed through rollers.
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7
Fold rectangle in half and feed through rollers 8 more times, folding in half each time and dusting with flour as necessary to prevent sticking.
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8
Turn dial to next (narrower) setting and feed dough through without folding.
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9
Continue to feed dough through without folding, making space between rollers narrower each time, until narrowest setting is used.
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10
Cut rolled-out dough into 31/2-inch squares.
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11
Gather trimmings into a ball and wrap in plastic wrap.
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12
Transfer squares to a wax-paper-lined baking sheet and cover with plastic wrap.
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13
Roll out and cut remaining dough in same manner, then repeat with trimmings.