George and Kostas “Charlie” Tiglianidis are serious about their gyros. After the brothers closed their family deli, Orchard Cafe, in Norwood, after 15 years, they opened The Feisty Greek in the same strip mall last year. They also consulted with a visiting chef from Greece to fine-tune their gyro marinade. They did away with the carving knives you usually see on the large vertical spit of meat and opted instead for a rotating blade designed to shave pork shoulder into fine shreds. As George Tiglianidis explains, pork — not beef or lamb — is the traditional choice for the Greek version of this dish. French fries are also commonly tucked into this pita wrap, so they decided to do that too.