Filling #1: Combine mincemeat, walnuts, apples, brown sugar, lemon juice and rum in a bowl. Mix well. Cover and refrigerate overnight. Thaw to room temperature.
Filling #2: Simmer all ingredients in a saucepan over medium heat for 10-15 minutes, stirring occasionally until apples begin to soften.
In a large bowl, combine flour and salt. Cut/pinch in chilled shortening until mixture resembles coarse crumbs. Stir in water a tablespoon at a time, mixing gently with a fork, until mixture forms a ball.
Divide dough in half, and shape into balls. Wrap in plastic, and refrigerate for 4 hours or overnight.
Preheat oven to 400º.
Roll out dough on a floured counter. Don't over work it.
Pour filling into shell. Top with crust and make slits or make a lattice top. Crimp edges.
Bake in preheated oven on low shelf for 40 minutes or until golden brown.
