Dissolve the yeast with 1 teaspoon of sugar and flour.
Add the 200g fat and lukewarm water and knead into a soft dough with about 600g flour.
Roll the dough out well and spread it with the 250g margarine, the way you would for a zelnik (pie).
Shape into two rolls and leave [?] to rise.
[?] roll them out and brush the top with egg.
Bake in the oven.