We prefer to knead this dough in a standing mixer, but a food processor or your hands can do the job. If using a food processor, place the flour mixture in a processor fitted with the dough blade. Mix together the eggs, yolk, butter, and water in a large measuring cup and, with the processor running, add the egg mixture in a steady stream. Process until a ball of dough forms, about 1 minute. Remove the dough to a lightly floured surface and knead by hand for an additional minute, or until the dough becomes smooth and elastic. Alternatively, you can mix the dough by hand in a large bowl with a wooden spoon, until the dough comes together. Then transfer the dough to a lightly floured surface and knead until the dough forms a smooth ball. If the dough remains tacky, add more flour 1 tablespoon at a time. This method will take longer than using a standing mixer, but you will get the same results.