I get frozen sliders in the local grocery (six count pkg.) I microwave them as soon as I get home...
I got hooked on White Castle many years ago - their store in Brooklyn was the only burger joint in those days open 24 hours, and sliders never taste better than after a long night of beer and shennanigans!
This move by Impossible Foods to add to the White Castle line is a good one. I have had their burger and I can verify that they are good. Not a scrap of actual meat. Good for the environment and so tasty too.
KC