By way of an anonymous tip, we've learned that the Food Network was at SFist favorite and home of the Mongolian Beef Cheesesteak, HRD Coffee Shop earlier today filming a segment for an upcoming episode of Diners, Drive-Ins and Dives. The shop, which falls somewhere between the "diner" and "dive" categories, hosted a group of regulars and friends to be part of the show along with (we assume) the annoyingly-coiffed "chef" and host Guy Fieri. Certainly they can't all be there for anything other than the Mongolian Cheesesteak.