If you are ever at Newark, flying UA out of Terminal C, I highly recommend getting a burger at Garden State Diner. It's right past security as you walk towards your gates.
It is probably in my Top 50 burgers of all time, and easily in my Top 5 Airport Burgers of all time.
I got the NJ Turnpike Burger, which comes with onions, bacon and cheese, which I asked them to hold.
The beef is a good solid 8 oz., charred nicely on the outside and cooked medium rare as requested (shocker, I know). And while the bun was a bit squishy it was substantial enough to hold up the heft and juices from the beef and onions. Surprisingly, the beef was well-seasoned too, as the burger really didn't need much in the way of ketchup, mustard, etc. I probably should've asked, but I wouldn't be entirely shocked if the patty was actually hand-formed.
And, full disclosure, the waitress was kind enough to "upgrade" my fries to an order of Elvis Fries, which are basically fries covered with chili and cheese. I didn't really get into these, as I figured a half pound of beef was more than enough to get me through my flight ...