Knead the dough well and let it rest for 2 days.
Day 1: make an additional layer of dough (nice), and along the edges arrange: prosciutto, 6 whole hard-boiled eggs, mozzarella cheese, parmesan cheese, basil.
Roll it up like a croissant, then curl the croissant into a circle.
On top, brush with oil and spread beaten egg yolk over it.