To make the dough warm up the milk in a pan until it is luke warm
Add the yeast and caster sugar, then cover it with cling film and leave it for 10 minutes
After the 10 minutes uncover it and add the egg yolks and melted butter, and whisk it all together
In a bowl stir the flour together with the salt. Pour the milk mixture into the flour and mix until a dough forms. Cover it with cling film and leave it in a warm place to prove for 1 hour
While it's proving, make the kolace crumble. Put the butter, caster sugar and plain flour in a bowl and rub it all together until it resembles breadcrumbs
Pre-heat your oven to 180C Fan/200C/400F/Gas Mark 6
Once the dough is proved, flour your work surface and roll it into a rectangle, then spread it out on a lined baking tray
Sprinkle the breadcrumbs on top, then the blueberries and the kirsch soaked cherries, then finally sprinkled the crumble all over. Brush the edges with the beaten egg
Bake it for between 20-25 minutes until it is golden brown
Allow to cool, then slice and serve with a cold Budvar!