Mash the potatoes until lump-free. Separate the yolks and whites of the eggs and beat separately; the yolks until lemon-colored, the whites until stiff. Add the almonds, orange extract, sugar and egg yolks to the potatoes; mix well, then add the glass of whiskey, and when combined, fold in the egg whites. Have ready a greased and floured cake pan with a greased piece of butcher paper/baking parchment in the bottom. (Or alternately, prepare 2 pie crusts and fill them with the mixture.) Bake at 190ºC for 40-45 minutes.