Unroll dough, and separate into 4 rectangles; pinch seams to seal. Stir together granulated sugar and cinnamon, and sprinkle evenly over rectangles. Roll up, jellyroll fashion, starting with a long side; press edges to seal. Cut each log into 5 slices; and place in a lightly greased 20 cm round cakepan.
Bake at 180ºC for dozen minutes.
Stir together confectioners sugar, milk, and vanilla in a small bowl until smooth; drizzle over warm rolls.
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