Stir together mincemeat, pears, and orange juice in a large mixing bowl; set aside.
Prepare Pastry for Double-Crust Pie. Place one ball of dough on a lightly floured surface; flatten slightly using the palms of your hands. Roll from the center to edges, forming a 12-inch circle. Wrap pastry around the rolling pin; unroll onto a 9-inch pie plate. Ease pastry into pie plate, being careful not to stretch pastry. Trim 1/2 inch beyond edge of pie plate.
Transfer mincemeat mixture to pastry-lined pie plate.
Roll out remaining dough on a lightly floured surface. Cut eight 1/2- to 1-inch-wide pastry strips with a pastry wheel. Weave strips on top of pie to form a lattice. Press ends of strips into rim of crust. Fold bottom pastry over strip ends; pinch to seal with your fingers, and flute pastry edge. Cut leaves or other decorative shapes from remaining pastry with hors doeuvre cutters or small cookie cutters. Lay on top of filling and lattice.
Cover pie edge with foil. Bake in a 375 degree F oven for 25 minutes. Remove foil. Bake 20 to 25 minutes more or until the top is golden. Cool on a wire rack. Serve warm with vanilla ice cream, if desired. Makes 8 servings.
Pastry for Double-Crust Pie:
Stir together 2 cups all-purpose flour and 1/2 teaspoon salt in a large bowl. Using a pastry blender, cut in 2/3 cup shortening or lard until pieces are the size of small peas. Sprinkle 1 tablespoon water over part of mixture; gently toss with a fork. Push to side of the bowl. Repeat, using 5 to 6 additional tablespoons of water, until all is moistened. Divide dough in half. Form each half into a ball.