Chocolate, Caramel, and Walnut Tart

Blend flour and salt in processor 5 seconds. Add butter to processor. Using on/off turns, blend until coarse meal forms. Add 4 tablespoons ice water. Blend until dough just begins to come together, adding more ice water by teaspoonfuls if dry. Gather dough; flatten into disk. Wrap; chill at least 1 hour. Roll out dough on lightly floured surface to 14-inch round. Transfer dough to 11-inch-diameter tart pan with removable bottom. Cut off all but 1/2 inch of overhang. Fold overhang in and press, forming double-thick sides. Pierce crust all over with fork; chill 30 minutes. Preheat oven to 400 °F. Line crust with foil; fill with dried beans or pie weights. Bake 20 minutes. Remove foil and beans. Bake until golden, pressing with back of fork if crust bubbles, about 20 minutes longer. Cool completely.