Bobby, being from NJ, that's the first time you tried White Castle?? or was that just a NY thing?
Back in the day, they were called Belly bombers. We would go out to the bars, get drunk, and hit White Castle before you went home.
the average guy would get 6, some even a dozen and we would hang by the car or whatever and down those burgers.
it was also the place to go that late because other than a diner, it was the only place opened.
Now about how the burgers were cooked back then. Not sure if they do the same Today.
The onions are placed on the grill with the burgers, cooked together, the bun is placed on the grill, closed, then opened and the burger is placed in the bun with the onions and a big stainless steel bowl over top. Like they are steamed more than grilled.
That's why the onions don't seem to be cooked through or Grilled.
Do they still have the holes in the burgers?
I haven't had White Castle in at least 30 years