1.Dissolve the dry yeast in 100ml of water to prepare the yeast. Mix with 100g of flour, knead and leave to rest for 1 hour.
2.Add the remaining flour, sugar, egg yolks, whole eggs, milk and start kneading with the mixer. Add softened butter and salt and you will get a compact and elastic dough.
3.Knead the dough into a ball slightly on the work surface. Let rise for 3 hours, or until doubled.
4.Divide the dough into balls and spread them on one side in the sesame seeds.
5.Transfer the sandwiches to the skillet, cover with a cloth, and let rest for another hour.
6.Dilute the egg white a little with a drop of water and brush over the sandwiches.
7.Cook at 190°C/374°F for 15 minutes.
