Mix by hand in a bowl - flour, sugar, salt, and Crisco/Parkay. Mix with your hands until it's crumbly. Take out 1/2 cup of the crumb mixture and set aside. In another bowl, mix with a spoon the molasses, water, baking soda and stir until the baking soda fizzes. Add the crumb mixture to the molasses mixture. Mix thoroughly, then pour into the 10� unbaked pie crust. Pour the 1/2 cup of crumb mixture that you set aside over the top of the pie. Bake at 325 degrees for 1 hour. Test with a toothpick for doneness.