30 g butter melt in a pan, add the walnuts and sugar. Mix and set aside. In a large bowl mix the yeast, sugar, 150 g sifted flour and salt. Milk is put on the stove, add the remaining butter and stir until melted. The temperature of the milk should not be more than 30 C. It is added to the dry mixture and stirred for about 2 minutes with a mixer. Add two eggs and stirred until a homogeneous mass. Gradually added to the mixture about 400-420 g of flour and knead dough. Sift the remaining flour on the table or in a suitable container and it doomesva dough. Should become elastic. When finished, was refluxed for 10-15 minutes. Then rolled into a rectangle 45h25 cm, dab with jam and dusted with the walnuts. Cut into strips 5 cm wide. The first is rolled in a spiral, and the other strip around it so as to obtain a large helix. Leave in a warm place for 30 minutes to double its volume. Smeared with egg yolk and bake in preheated oven at 180 ° C