Preheat oven to 200C/400F/Gas 6. Lightly grease bun tins.
Put flour, sugar and ground almonds into a mixing bowl and mix well together.
Rub margarine through the dry ingredients. Add the egg and water if required and mix to a soft dough.
Turn onto a lightly floured board and gently knead.
Roll pastry on floured board and cut rounds with a cutter to fit greased bun tins. Put a teaspoon of mincemeat into each and cut a ‘lid’ in the shape of stars, trees or hearts etc. from remaining pastry to put on top.