To make the pastry, place the Mix in a bowl and rub in the fats to resemble breadcrumbs. Stir in orange rind, beaten egg and sufficient orange juice to form a soft dough. Knead pastry well on a surface lightly dusted with Mix, then roll out 2/3 and cut out rounds to line tartlet tins. Place a spoonful of mincemeat in each. Roll out remainder of pastry and cut out desired shapes to complete pies. Brush with beaten egg and bake in a pre-heated oven for 15-20 minutes until golden brown. Serve warm dusted with icing sugar.