Sift the flour and put in the middle the yeast rubbed with a teaspoon of sugar. sprinkle a little flour, cover the bowl and leave it warm for 20 minutes. Then add the beaten egg with the yolk.
Mix the butter with the milk over low heat. Set aside from the heat and gradually pour the warm mixture of milk, sugar, salt and knead until you get an elastic dough. Let the dough rise for about 90 minutes.
Cover the poppy seeds with boiling water in which we added the rum and leave it for 30 minutes. Put the honey in a pan, and when it has melted, add the drained poppy seeds. Let it simmer, stirring until you get a thick cream.
Divide the dough into two equal pieces. On the table sprinkled with flour, spread two sheets 0.7 cm thick. We put on each one an equal portion of cold filling and we roll a roll as long as the shape in which we will bake the cake.
We weave the two rolls and place them in the butter greased with butter and lined with baking paper. Let the dough rise for about 60 minutes. grease with a yolk mixed with the two tablespoons of milk and bake at 180 degrees for 40-45 minutes.