What is the defining characteristic of *Osso Buco* preparation originating in Milan?

Answer

It is braised slowly, typically in red wine, until the veal shanks are very tender

*Osso Buco* involves slowly braising cross-cut veal shanks, often in red wine, a method emphasizing deep flavor extraction through patient, wet cooking.

What is the defining characteristic of *Osso Buco* preparation originating in Milan?
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