To glaze pastry, which is the usual method adopted for meat or raised pies, break an egg, separate the yolk from the white, and beat the former for a short time. Then, when the pastry is nearly baked, take it out of the oven, brush it over with this beaten yolk of egg, and put it back in the oven to set the glaze.
To ice pastry, which is the usual method adopted for fruit tarts and sweet dishes of pastry, put the white of an egg on a plate, and with the blade of a knife beat it to a stiff froth. When the pastry is nearly baked, brush it over with this, and sift over some pounded sugar; put it back into the oven to set the glaze, and, in a few minutes, it will be done. Great care should be taken that the paste does not catch or burn in the oven, which it is very liable to do after the icing is laid on.
Sufficient: Allow 1 egg and 1 1/8 ounces of sugar to glaze 3 tarts.