2 oz. of butter, 4 EGGS, 1/4 lb. of castor sugar, 1/2 oz. of ground almonds (half bitter and half sweet), 6 oz. of cold boiled and grated potatoes, and 1-1/2 oz. of sifted breadcrumbs. Cream the butter in a basin, which is done by stirring it round the sides of the basin until soft and creamy, when it will make a slight crackling noise. Stir in the yolks of the EGGS, the sugar, and almonds; beat for 10 minutes, then stir in the potatoes and breadcrumbs, and last of all the whites of the EGGS whipped to a stiff froth. Turn the mixture into a well-buttered dish, and bake in a moderately hot oven from 3/4 of an hour to 1 hour.
The Allinson Vegetarian Cookery Book, by Thomas R. Allinson (Year 1915)