Lombardy / Milano
At the moment we recommend to start with the yearly published Gambero Rosso Guide Milano. Comprehensive information offers the happycow.net online guide, which should include all vegetarian and vegan restaurants / bistros in Milano. www.happycow.net/europe/italy/milan/
Especially we recommend the “Must Visit” fine dining vegetarian restaurant Joia - www.joia.it It was years ago the first (and still the only) Italian Vegetarian restaurant stared by the Guide de Michelin. At tripadvisor you find more than 1100 reviews about Joia.