In the bowl of an electric mixer fitted with the paddle attachment, cream the butter. Beat in the salt and sugar. Stir in the half-and-half and 1/4 cup flour. Add the remaining flour, mixing with your fingertips or a fork until the ingredients are combined. Turn the dough out onto a piece of plastic wrap, and shape into a flat disk. Wrap, and refrigerate for at least 1 hour. (This can be prepared a day ahead.)

Butter a 10-inch tart pan with a removable bottom. Roll the dough out between two large sheets of plastic wrap into an 11-inch circle. Remove the top sheet of plastic. Invert dough into the prepared pan. Trim and finish the edges. Cover, and refrigerate for at least 1 hour.

Heat the oven to 350 degrees. Line the tart with parchment paper or aluminum foil, and fill with beans or pie weights. Bake until the crust is firm and set, about 20 minutes. Remove the beans and paper. Prick the bottom of the crust so it does not puff. Continue baking until well browned, 10 to 15 minutes.

This recipe yields one 10-inch crust.