In a bowl put the yeast and crushing with a spoon add 2 tbsp sugar and continue to crush, add 1-2 tbsp cold water and 1 tbsp flour. Leave in a warm place to rise. In another court put the remaining sugar and pour 200 ml lukewarm water to make syrup. In a deep pot bruised eggs by separating the 2 yolks Beat with a mixer, add the oil, yogurt, sugar syrup, leavening yeast and mix well. Add half of the flour was added and stirred until it is rarely dough. In pan pour the remaining flour, sifted at least 3 times and put 1 tbsp salt, pour the rare dough and knead to a smooth and soft dough. Smeared with sunflower oil and leave to rise. When rise is divided into 4 balls knead lightly and leave to rise again. Leavened balls are divided into 4 parts. Small balls spread his hands smeared with butter, pull in the shape of cigars and twisted at both ends, then formed like a snail shell - if you fail to make the forms, make it your way. Arrange in a deep pan and leave to rise. Beat two egg yolks with the butter and smeared. Bake at 180 C in a heated oven.