These little pastry and currant sugar bombs were invented in Eccles, a small town near Manchester a couple of centuries ago. Also known as squashed fly cakes.
Brush the tops with beaten egg and score 2 parallel lines on each one. Cut right through the pastry in the middle of each line. Sprinkle with granulated sugar and bake in the oven for 15-20 minutes.
Beaten egg and white granulated sugar to glaze. If you want to make your own pastry, the recipe is here: http://www.keefcooks.com/how-to-make-puff-pastry/