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You should try to build a chamber that sprays liquid nitrogen or other cryogenic liquids at the food.
Idk, good luck.
There is a drink chiller that chills drinks in about a minute. You could use the same idea for other things.
That's an air conditioner. Or a fridge.
You just need to adjust the output and input sizes. Do to like... physics. It is easier to add heat to a system than to remove it.
In beer brewing there's a point where you want to cool your beer down as quickly as possible.
A chiller is dropped into the just cooked wort. (wort is the beer before fermentation).
It goes from steaming hot to room temperature very quickly.
It's just a spiral pipe that you run cold water through.
Sounds like you need something like that for a potato.
I present the Macro Wave!
Yeah there are those machines that like instantly cool your soda can or make ice cream instantly supposedly. They just bathe it in ice and salt water for some time basically
Removing heat energy is what your freezer does, by transferring it outside of the freezer box.
You canβt just remove heat by adding electromagnetic energy. Absorbing energy from the electromagnetic radiation makes heat.
Edit: whelp, TIL
The magnetocaloric effect can do this. Instead of the target absorbing energy, the magnet does. The magnet heats up and the target cools.
What I would like to know is if we will ever have microwaves that stop the spinning plate in the same place that they started. It's XXI century, I want to take out my cup as easily as I've put it in.