This is The One, the Holy Grail of Gregoire sanwiches. Much as I love the beef patty, the cheesesteak beats all. It's their most popular sandwich of all time, the only sandwich that outsells the potato puffs. Ironically, its popularity means they almost never offer it because it's so much damn work for the chefs. Gregoire was finally bullied into bringing it back, but after October it may be more than a year before it returns.
Not too much to it. Thinly sliced flank steak, quality mushrooms, onions and cheese grilled to order and served on a toasted baguette. As with all of Gregoire's sanwiches, it's the quality of ingredients, particularly the meat, that stand out. The flavors come together to make a sandwich that is deeply satisfying. I haven't been to Philadelphia, but I've never had a Cheesesteak this good on the West Coast. I also noticed the truffle scalloped potatoes on the menu, best potatoes at Gregoire, period. Newbies order the puffs, old Gregoire fanatics or the scalloped.
Here's rworange (AKA Krys) raving about the Cheesesteak last time it was on the menu "A Philly native would weep that such a sandwich could so outclass the original.":
You've got one month, my fellow hounds, and then it will be gone.
Don't forget about the new location in Oakland.