In a bowl, mix lukewarm milk with yeast, set aside

In a large bowl, mash potatoes, then mix in flour and salt

Make a well in center and pour in yeast and oil, knead

Cover dough and let rest for 1 H

Roll flat dough and brush lightly with unsalted butter then fold into an envelope, let rest for 10 mins

Roll flat dough again, and brush light with unsalted butter, then fold again. Let rest for 10 mins

Roll flat dough again and cut with circle cookie cutter

Brush top with beaten egg and bake on 350 F for 25 minutes or until golden