0.5 lb puff pastry dough
1/4 lb sugar (1 cup)
1 cup fresh or frozen black currant (or blueberries)
3 tbsp flour
Mix the black currant with sugar (try do not press and keep berries whole).
Roll the dough in a long stripe.
Sprinkle the dough with the flour.
Pre-heat an oven to 200 c (400 F).
Place a thin layer of berries with sugar on dough on middle, evenly.
Roll dough tightly.
Whip the egg, and cover the all sides of roll.
Bake roll for about 25-30 minutes.
Cool and serve.