Makes 16 to 18
Cook the potatoes in their jackets. Peel. Add salt and mash while warm. Work the flours into the mashed potatoes, a little at atime with egg whites. Knead the dough well.
Roll on a lightly floured board into thin round cakes.
Bake on both sides on a greased griddle over low heat until done. Watch them closely to keep them from burning.
Serve with melted butter and honey, or a cognac sauce.