Mix flour, water, egg, and salt together. Knead until dough is smooth, cover with bowl and let sit for 30 minutes.
2
Peel and boil the potatoes until soft. Drain and place into bowl, cover with 8 ounces of cheese. Mash together with milk and set aside.
3
Roll out on floured surface, about 1/8 inch thick. Using a glass or round cookie cutter, cut discs from dough and using leftover dough, keep rolling out until you''ve used all the dough or at least most of it.
4
Place a spoonful of potato/cheese mixture into center of disc. Fold dough over mixture and press out air around mixture. Using a fork, press against edges to seal in mixture.
5
Boil water and cook for 8 minutes and then drain. Heat butter in frying pan and fry until golden brown.
6
Serve with sour cream, or saute some onions in butter and serve with onions.