Translations:Das Kochbuch der Maria Christina Eckart von 1776/6/en

"Finely grate 500 grams of hard-boiled, peeled and cooled potatoes. Put twelve eggs, four egg yolks and 250 grams of finely ground sugar in a clean, glazed bowl and whisk them in one direction for half an hour, then stir in the above-mentioned potatoes for eight minutes. Grease the baking pan with butter, sprinkle it with fine breadcrumbs and pour in the dough (leave about two inches below the top rim, so that the dough has room to rise). Bake in the oven, but not too hot, carefully turn out the cake and leave it to cool. If one wants, one can mix in finely shredded lemon peel and decorate it with names, flowers and so forth."