#Ingredients #For the dough #Whey 500 ml #Salt 1 tsp. #Yeast 1 tsp. #Vegetable oil 20 ml #Flour 750 - 780 g #For filling #Boiled potatoes 1 kg #Salt to taste #Butter 10 g #Boiled potato water 100ml #For extra #Egg yolk and milk #Sesame