The Italian diet is famously delicious, from cornetto for breakfast to pizza for dinner – and then there’s ice cream. And the wine. No one is more aware of that than Luciano Fregonese, the mayor of Valdobbiadene in northern Italy. He has held the post for 10 years and put on 50 kilos in that time. He decided it was time to change and is leaning on his villagers as he works to shed the pounds. It’s all the fault of “social obligations” as mayor, says Fregonese, who is is out and about meeting people from morning until night. All those meetings with community citizens don’t leave any time for ex…