Dissolve yeast and sugar in small amount of warm water and set aside. Scald milk, add butter. Let cool, then mix beaten eggs, sugar, salt and yeast. Add this to the cooled milk and margarine. Add flour and mix. Cover and let stand 5 to 6 hours. Dough will be a little sticky, but don't add more flour. Knead on floured board. Divide in half and roll out to a round circle 1/8 inch thick. Cover with melted margarine. Cut in 16 pieces pie shaped. Roll large end first. Put on greased cookie sheet. Let stand for 5 to 6 hours. Bake in 325F* oven about 10 minutes until golden brown. You can put them in freezer in sealed bag while warm and reheat when you want to use them.
[* originally written as 350F, I have opted for the penned notation here.]