Make puff or chopped paste, according to the rule given, and let it get chilled through; roll it again four times, the last time leaving it a piece about seven inches square. Put in the ice chest for at least half an hour; then roll into a ten-inch square. Place on this a plate or a round tin, nine and a half inches in diameter, and, with a sharp knife, cut around the edge. Place another plate, measuring seven inches or a little more, in the centre. Dip a case-knife in hot water and cut around the plate, having the knife go two-thirds through the paste. Place the paste in a flat baking pan and put in a hot oven. After twelve or fifteen minutes close the drafts, to slacken the heat, and cook half an hour longer, being careful not to let it burn. As soon as the vol-au-vent is taken from the oven, lift out the centre piece with a case-knife, and take out the uncooked paste with a spoon. Return the cover. At the time of serving place in the oven to heat through; then fill and cover, and serve while hot. The vol-au-vent can be made and baked the day before using, if more convenient. Heat it and fill as directed.