Dessert

Rub cold diced butter into plain flour, then mix in caster sugar
Combine and knead the pastry briefly into a firm ball
Preheat the oven to 400°F.
Press walnut-sized balls of pastry into 18 holes of patty tins to line them
Spoon mincemeat into each pastry shell
Pat slightly smaller balls of pastry between your hands to make round lids
Place lids on the pies and press the edges gently to seal
Optionally freeze the pies for up to 1 month
Beat the egg and brush it over the pie tops
Bake the pies for 20 minutes until golden
Leave the pies to cool in the tin for 5 minutes, then transfer to a wire rack
Lightly dust the cooled pies with icing sugar before serving