Ukrainian
Dissolve the yeast and 1 tbsp of the sugar in the warm milk, stir in 75 g of the flour and leave this starter in a warm place for 30 minutes, until bubbly.
Beat the eggs and the egg yolk with the remaining sugar, the salt, vanilla and lemon zest, then add them to the starter with the melted butter.
Add the remaining flour gradually and knead for 10-15 minutes into a soft, slightly sticky dough; knead in the rinsed and dried raisins.
Cover and let the dough rise in a warm place for 1.5-2 hours, until doubled, then punch it down.
Divide the dough between two buttered tall tins about 12 cm across, filling them one third full, and let rise for 40-60 minutes, until the dough nearly reaches the rim.
Bake at 180C for 35-40 minutes, until a skewer comes out dry; cool on their sides for 10 minutes, then upright.
Whisk the egg white with the powdered sugar into a thick white icing, spread it over the tops of the cooled paska and let it set.