French fries. No, they weren’t invented in Pittsburgh (or France for that matter) but Pittsburgh has taken these crispy slices of gold to an all new level — as a condiment. In the ‘burgh, fries are as likely to be on a sandwich as next to it, especially if you’re at Primanti Brothers, which is to Pittsburgh what Geno’s and Pat’s are to Philadelphia. The sandwiches are served on thick slizes of Italian white bread, layered with vinegary coleslaw, tomato, French fries and — if your a true ‘burgher — a fried egg. Every table has a bottle of Trappey’s…