Yep. It's a burger. Nothing escapes your eagle eyes, does it? Once upon a time, the presence of a fried egg atop a burger would have been the only clue you needed; while it's still not a common burger topping, I'll give you a hint: This is NOT at Slater's 50/50, but it's not far away.
One guess per person, use a valid email, and no Weeklings allowed. Bonne chance . . .