Add egg gradually, beating thoroughly after each addition. Transfer mixture into large bowl, sift dry ingredients onto well floured surface and knead for 1-2 minutes or until smooth. Cut dough into shapes with a 13cm gingerbread man cutter. Press remaining dough together and reroll. Cut out shapes.
Place biscuits on prepared trays.
Place currants as eyes and nose on men. Bake for 10 minutes or until lightly browned. Cool biscuits on trays. Place egg whites in small dry mixing bowl, using electric beaters beat egg whites until foamy. Add lemon juice and icing sugar gradually.