Pre-heat your oven to 275 degrees. Cream shortening, brown sugar & egg yolk thoroughly Sift flour, salt & cinnamon and add to the creamed mixture. Pat dough evenly on a greased cookie approximately 11" x 14" x 1". (I use a rolling pin to make the dough super flat and even. My rolling pin is the one my Dad made when he and Mom married and the handles come off so it fits in the pan. You could use any smooth round implement to do this) Pour the unbeaten egg white over the top of the dough and spread or brush evenly. Pour off the excess. Sprinkle the nuts on the dough and use the rolling pin again to press the nuts into the dough a bit. Bake for 35 minutes. They do not look particularly baked, just take them out after 35 minutes! Cut them immediately into triangles but don't take them out of the pan until they are thoroughly cooled. Recipe makes 2-3 dozen depending on the size of your triangles.