From UrbanDaddy:
THURSDAY POWER LUNCH
Jack Falstaff's Off-the-Menu Burger
Order the secret burger, and you'll get a hamburger stuffed with braised short ribs, topped with bacon and a fried egg and served with Pt. Reyes blue cheese fries. You'll also get a salad, because we wouldn't want you thinking this is at all unhealthy.
411: $20, available for lunch or dinner, Jack Falstaff, 598 2nd St (at Brannan), 415-836-9239