To prepare the dough, combine the flour and salt in the bowl of a food processor fitted with the metal blade. Add the butter. Process until the mixture resembles coarse meal, 8 to 10 seconds. Add the egg yolks and pulse to combine.

With the processor on pulse, add the ice water a tablespoon at a time. Pulse until the mixture holds together as a soft, but not crumbly or sticky, dough. Shape the dough into a disk, wrap in plastic wrap, and refrigerate until firm and evenly moist, about 30 minutes. If making tarts, divide into 4 equal pieces of dough.

To prepare the dough, lightly flour a clean work surface and rolling pin. Place the dough disk in the center of the floured surface. Roll out the dough, starting in the center and rolling up to, but not over, the top edge of the dough. Return to the center, and roll down to, but not over, the bottom edge. Give the dough a quarter turn, and continue rolling, repeating the quarter turns until you have a disk about 1/8 inch thick.

Drape the dough over the rolling pin and transfer to the tart pans with a removable bottom, unrolling over the tin. With one hand lift the pastry and with the other gently tuck it into the pan, being careful not to stretch or pull the dough. Let the pastry settle into the bottom of the pan. Take a small piece of dough and shape it into a ball. Press the ball of dough around the bottom edges of the tart pan, snugly shaping the pastry to the pan without tearing it. Remove any excess pastry by rolling the pin across the top of the pan. Prick the bottom of the pastry all over with the tines of a fork to help prevent shrinkage during baking. Chill until firm, about 30 minutes.

To blind bake, preheat the oven to 425°F. Crumple a piece of parchment paper, then lay it out flat over the bottom of the pastry. Weight the paper with pie weights, dried beans, or uncooked rice. This will keep the unfilled piecrusts from puffing up in the oven.

For a partially baked shell that will be filled and baked further, bake for 20 minutes. Remove from the oven and remove the paper and weights. (You can reuse the rice or beans for blind-baking a number of times.) The shell can now be filled and baked further, according to the recipe directions. For a fully baked shell that will hold an uncooked filling, bake the empty shell until a deep golden brown, about 30 minutes total.