Preheat the oven to 425 degrees F.
To make the crust: Sift the flour, sugar, salt, and cinnamon into a medium-size mixing bowl. Using a pastry cutter or your fingers, work the butter into the flour mixture until coarse crumbs form. Mixing with a fork, add ice water, 1 tablespoon at a time, just until the dough holds together. Press the dough into a ball and divide in 1/2. Flatten each piece into a disk, wrap in waxed paper and refrigerate for 1 hour.
To make the filling: Put the raisins in a medium-size bowl and pierce them with a fork so they will soak up the rum. Pour rum over raisins and let stand at least 1 hour. Strain, return raisins to the bowl and stir in pie filling. Set aside.
On a lightly floured surface, roll out 1 piece of dough and fit it into a 9-inch pie plate. Pour in the filling and sprinkle the gelatin over the top. Roll out the remaining dough, fit it over the top of the pie, pinching the edges together to seal. Trim and crimp the edges. Pierce the top of the pie in a few places with a fork to make steam vents.
Bake for 10 minutes and then reduce oven to 325 degrees F. and bake until crust is browned, about 45 minutes. Place on a rack to cool. If using icing, heat it in the microwave just until melted, then drizzle over the pie. Cut into wedges and serve.
Copyright 2002, Janette Barber and Christina Deyo, all rights reserved