Ossobuco (pronounced ( ssobuko); Milanese: oss bus (zbys) ) is a Milanese speciality of cross-cut veal shanks braised with vegetables, white wine and broth. It is often garnished with gremolata and traditionally served with either risotto alla milanese or polenta, depending on the regional variation.

Answer this question based on the passage: what part of the cow is osso bucco? OK. Let's think. My stream of consciousness:
The relevant information is: Ossobuco (pronounced ( ssobuko); Milanese: oss bus (zbys) ) is a Milanese speciality of cross-cut veal shanks braised with vegetables, white wine and broth. The answer is cross-cut veal shanks.