Potato Doughnuts

Ingredients

 * 4 big potatoes
 * 2 oz/50 g yeast
 * 7 oz/200 g sour cream
 * 3 yolks
 * salt
 * flour as needed to make a dough
 * 1 cup oil for frying
 * chopped ham or sheep's cheese

Directions

 * 1) Roast the potatoes in their jackets, then peel and grate them (while they are hot).
 * 2) Place them in a bowl, add the yeast mixed with the sour cream and yolks, salt and mix with flour to make medium soft dough.
 * 3) Cover the bowl with a cloth and let rise in a warm place.
 * 4) After it has risen well, roll a sheet the thickness of a pencil.
 * 5) Cut rounds with a glass and place some ground ham or crumbled sheep cheese mixed with an egg on each round.
 * 6) Cover with another round and make sure the edges stick.
 * 7) Fry in hot oil and serve hot with tea.