Preheat the oven to 180°C.
Unroll the pastry onto a large chopping board.
Choose a mug that is wider than the holes in the tin so that the pastry would cover the sides well, when pushed down.
Cut out about 12 rounds with the mug and press them lightly into the tin holes. Fill each with mincemeat.
Roll out the leftover pastry to the same thickness and cut out 6 rounds, big enough to cover the pies. Use a small star cutter to cut out star shapes from it. Put the stars on half of the pies and the cut-out rounds on the other half. Secure the tops with a drop of plant based milk or egg (or pinch them together with your fingers).
Put the tin into the preheated oven and bake the pies for about 20 minutes, until they’re golden brown.
Transfer them onto a wire rack.
When they’re cool dust, them with icing sugar.