I have the freezer-case White Castle sliders from time to time, and have passed the habit on to my daughter.

Gecko and I had a slider party one time. We each had our own favored choice — White Castle for me, Krystal for him — with a little extra preparation. I had determined that to make frozen ones more like the fresh ones, some warmed ketchup was needed, and possibly some extra reconstituted onion. For the Krystals, it was extra mustard.

A good time was had by both of us. I should have had one of the Krystals, but that didn't seem to occur to me at the time.