PLACE rack in lowest position in oven. Heat oven to 425°F.
To use NONE SUCH® Condensed Mincemeat: Crumble 2 (9 oz.) packages condensed mincemeat into medium saucepan. Add 2 ¼ cups water. Bring to a boil over high heat. Cook and stir 1 minute. Cool completely. Proceed as directed above.
ROLL out half of pastry dough on floured surface and line 9-inch pie plate. Fill with mincemeat. Roll out remaining pastry dough on floured surface. Cover filling with top crust. Seal and flute edges. Cut a few slits near center to vent steam. Whisk egg and water in small cup until blended, if desired. Brush over crust.
BAKE 25 to 30 minutes or until golden brown. Cool completely on wire rack.