Forget about carbonara and parmigiana — these are the distinctive regional dishes to look for in Sardinia.Credit: Ellen van Bodegom / Getty ImagesThe second largest island in the Mediterranean, Sardinia is well known as a summer hot spot with pristine beaches and glamorous resorts. Beyond the ritzy Costa Smeralda and its trendy restaurants and beach clubs, the island has retained traditional ways of life, with recipes passed down from one genera…