Start by dissolving yeast with a quarter of a cup filled water, poured into a small bowl. Take another bowl, and while you let the yeast rest for 10 minutes, mix in – with the use of a stand mixer – the appropriate amount of flour, salt, and sugar. Add the yeast and mix at a low speed. Smoothly turn the speed to medium and keep turning for 7 minutes.
Get another bowl and lightly oil it and place the dough you recently made in there. Cover it with a plastic wrap and in about an hour of sitting in a warm place it will double in size.
Roll some of the dough in order to make a circle. Careful you leave enough because you’ll have to make another circle in a few minutes. Take the Nutella (be careful to take it out the fridge for a while so it would be easy to spread; you could also microwave it for 30 seconds to be sure) and pour an even layer on the surface, but leaving half an inch of margin of dough all around.
The next step is to place another roll off dough (Nutella free) on top. Afterward, place it on a parchment-lined or silicon-lined baking sheet. It’s advised you sprinkle the sheet beforehand with cornmeal. Use a knife to cut the dough down the middle, but keeping one end intact. Look at the image for guideline.
By turning the cut side toward the top, twist the ends of the dough overtop each other. Do this for every cut you made. For the next 20 minutes, let your future bread sit in a dry place, but make sure you cover it with plastic wrap. In the meantime, prepare the oven. Set it to 350°F. Before placing the dough in, brush it with some egg wash. Then, bake at this temperature for about 20 minutes. To get that lightly brown look and taste on top, raise to 425°F and bake for another 5-7 minutes. It’s done! Let it cool before serving.