Who is Miriam Leonardi from Heat: An Amateur's Adventures as Kitchen Slave, Line Cook, Pasta Maker, and Apprentice to a Dante-quoting Butcher in T and what is their importance?

Miriam Leonardi worked in a restaurant in Italy where Bill visited during his time at Babbo. Miriam prepared for Bill the first plate of fresh pasta he had ever had. As a result, Bill became obsessed with the idea of learning how to make pasta. Bill tried to get Miriam to teach him how to make pasta but she finally admitted to him that she could no longer roll out the dough herself. Instead, she started using a pasta machine to do the work for her. This caused Bill to feel some pity for Miriam and to also be disappointed that her pasta was not truly authentic.