Prepare the Dough:
In a small bowl, combine warm milk and yeast. Let it sit for about 5-10 minutes until foamy.
In a large mixing bowl, whisk together flour, sugar, and salt. Create a well in the center and add the yeast mixture, eggs, melted butter, and vanilla. Mix until a dough forms.
Knead the Dough:
Transfer the dough to a floured surface and knead for about 5-7 minutes until it’s smooth and elastic.
First Rise:
Place the dough in a greased bowl, cover with plastic wrap or a damp cloth, and let it rise in a warm place for 1 hour or until doubled in size.
Prepare the Pastry Cream:
In a saucepan, heat the milk over medium heat until it just begins to simmer.
In a bowl, whisk together egg yolks, sugar, and cornstarch until smooth. Gradually add the hot milk to the egg mixture, whisking constantly to temper the eggs.
Return the mixture to the saucepan and cook over medium heat, stirring continuously, until thickened. Remove from heat and stir in butter and vanilla. Let cool.
Shape the Bomboloni:
Once the dough has rise
