Cream the butter, beat in the eggs, and add the cheese with a few grains, each, of salt and paprica. Roll the pastry very thin and cut it into two rectangular pieces; lay one of these on a baking-sheet and spread with the cheese mixture; cover this with the second piece of pastry. Score with a knife in strips one inch wide and about three inches long, brush over with beaten egg, and bake about fifteen minutes. Cut out the strips while hot. Serve at once, or reheat before serving.