Prepare crust: Preheat oven to 450 degrees F. In a bowl stir together the flour, toasted almonds, sugar and salt. Using a pastry blender, cut in the butter until pieces are pea size. Sprinkle 1 tablespoon of water at a time, over part of the flour mixture; toss with a fork. Push moistened pastry to side of the bowl. Repeat moistening flour mixture with remaining water, using 1 tablespoon water at a time, until flour mixture is moistened. Shape into a ball.