“If you were hoping for real authentic Polish, you’re screwed.” That was one of the first things out of the mouth of the always-outspoken Scott Schroeder (right), chef of South Philly Tap Room and American Sardine Bar, at the outset of his class centered on the famously hearty Eastern European cuisine. That’s not to say the Detroit native, who was joined in the Pole-position festivities by chef Mark Regan (left) of SPTR, has no experience whatsoever with borscht and bigos. Back home in The D, Schroeder grew up visiting the traditional Polish neighborhood of Hamtramck, frequenting its many butcher shops, grocery stores and restaurants and soaking in all those feel-good babcia-crafted vibes. Nowadays, Schroeder, whose surname is far too vowel-heavy to pass for Polish, deals in thoughtful bar food, but that hasn’t squelched his interest in this kind of cooking.