Food processor pie pastry

1   tablespoon ice water, or more if necessary 

  Extra flour (for sprinkling) 

1. Have on hand a 9-inch pie pan.

2. In a food processor, pulse the flour and salt just to mix them. Add the butter and sugar and pulse just until they form crumbs.

3. In a bowl, whisk the egg, vinegar, and 1 tablespoon water. Sprinkle the liquid on the flour mixture and pulse several times or just until the mixture forms large clumps. Add more water, 1 tablespoon at a time, if necessary. Turn the dough out onto a lightly floured counter and knead gently to form a dough. Flatten into a round cake, wrap in foil, and refrigerate for 30 minutes.

4. Roll the dough to a 12-inch round and ease it into a 9-inch pie pan. Trim the edges (use them to stamp out stars for the top) and fold them under to form a neat rim. Crimp the edges all around.