Dissolve yeast in warm water, add 1 tsp sugar + 1 tbsp flour. Put the dough in a warm place for 1 hour. After she has increased significantly the cap and settled start kneading.

Pour the warm yogurt + the rest of the sugar, salt, beaten egg, mix well + add all the flour, knead and add flour, leaving a little on the mixing and podpis table. Now pour in the melted margarine. Well-kneaded, if necessary, add flour. The dough turns out very tender, not tough. Leave in a warm place for 1 hour to rise, don't forget to cover the dishes with the dough with a cloth, that it does not zavetrilos.

Meanwhile, making the filling. Boil potatoes in the usual way for the mashed potatoes. Do not add salt. With the finished potatoes drain all the water, leave a minute on the stove (to dry), you can now salt to taste, RUB them in order, add egg white. Add the prepared fried with onions mushrooms ( and there are fans of pickled mushrooms to add), chopped green onions and a pinch of dill. Mix well and leave to cool.

When the dough came, grew, became a lush - begin to carve. To divide into pieces (I made a large cheesecake and I came up with 12 pieces), the pieces podcating in equal balls and spread out on the table, previously sprinkled it with flour, after 10 minutes, the balls roll in tortillas, spread apart at a distance. Squeeze suitable diameter form, the middle and smear whipped cream yolk. In the center put the filling, the ring of dough to wrap around the finger three times and spread the toppings around the edges. Spread on a baking sheet, which can be lubricated with oil or cover with an oiled parchment. Grease top with beaten egg yolk and give time for the dough for 10-15 minutes. Send in the oven t 180 degrees for 30 minutes. In any case, check the temperature of his ovens.

After 30 minutes I got here are cheesecake. Brush them with melted butter - liberally! Flavorful, hearty, tasty tarts! Put them in a paper bag and go on sleigh with mountains, in between drinking hot tea with cheese... I dream! Since the last time I ride with the mountains, right on sledge, years... TSAT ago!