By Hand:
Divide the dough into four pieces and roll each out on a lightly floured surface.
Use a rolling pin to roll the dough as thin as possible (about 1/16-inch thick).
Cut into strips using a sharp knife or pizza cutter.
With a KitchenAid Pasta Roller Attachment:
Dust two baking sheets with flour and set aside.
Divide the dough into four pieces. Flatten one into an oval disc.
Using the Pasta Roller Attachment, roll the dough through on the widest setting (level 1) three times.
Lay the dough on your work surface, fold both short ends toward the center, then fold it in half to form a rectangle.
Continue rolling the dough, passing it through the pasta roller three times on level 2, three times on level 3, and once on levels 4, 5, and 6.
Place the pasta sheet on the floured baking sheet, dust with flour, and fold it in half. Sprinkle more flour on top to prevent sticking.
Repeat with the remaining dough.
Feed the pasta sheets through the Pasta Cutter Attachment or cut them by hand.