An authentic Philly Cheesesteak. I’d never had one in 24 years living in PA. Of course I was in Pittsburgh, about five hours away, so I’m going to give myself a free pass. Surely I would have had one at 3 a.m. after a night of drinking had I grown up in Philly! When we were in Philly last weekend, we decided to get cheesesteaks Sunday to eat as we settled into Paul and Sara’s family room to watch our beloved Steelers destroy and embarass the Cleveland Browns. But where to go? Anyone from (or who has lived in) Philly…