Frisselle is a twice baked bread that the Italians hydrate and use for soups and appetizers. We saw it being made at the largest maker in Italy - which was a tiny place! Anyway, they had a yeast solution they used that was over a hundred years old. It was okay, but not my favorite thing.
Evidently, all one needs to start a take out in Naples is a portable table, portable frying drum, and ingredients. Fresh fried folded pizzas as you wait. They were good, too.