Massimo Bottura's Pope Francis-Approved Refectory, and Recipe to Turn Stale Bread Into Gold

Italy's most progressive exhibition of sustainable cooking commences this Thursday, when the Michelin-starred chef Massimo Bottura throws open the doors of Refettorio Ambrosiano, the once-derelict theater repurposed to educate and feed the refugees and working poor who reside far across town from the multinational pavilions welcoming culinary touri...