Preheat oven to 450 degrees F (230 degrees C). Spray a baking sheet with cooking spray, or line with parchment paper.
Mix flour and salt together in a bowl, and use a pastry cutter to cut in 1/3 cup of shortening until the mixture forms pea-size balls. With a fork, form a small well in the center of the mixture, and pour in water, a couple of teaspoons at a time, and stir with the fork to mix in the water and form a dough. Incorporate each addition of water before adding the next, until about 3/4 of the flour mixture has formed a stiff dough. Work a little more water in with your hands, and shape the dough into a ball.
Working on a well-floured work surface with a floured rolling pin, roll the dough out into a rectangle about 12 by 16 inches, and about 1/8-inch thick. Spread 1 tablespoon of shortening over the surface of the dough with a soft spatula, and sprinkle sugar all over the dough square. Sprinkle the dough with cinnamon. Pick up a long edge of dough, and tightly roll the dough into a log shape. With a sharp knife, slice the log into 3/4-inch thick slices. Place the slices onto the prepared baking sheet.
Bake in the preheated oven until the cookies are lightly browned and sizzling on the bottom, about 8 minutes. Cool on paper towels; freeze extras for later.