Is there a way to deliberately explode other food than corn kernels?
I bet you could explode number of vegetables with a waxy skin.  Maybe a pumpkin.  I bet you could explode a water melon.  

Do NOT try this in your oven or microwave!  If it works it would have lot of power.  Try this out doors like in the middle of a fire pit like you would do a dutch oven.

Any food that has moisture and skin that is only slightly permeable to water vapor.  And it would need to be a skin that does not break down at the boiling temperature of water.  Will the skin survive long enough is the question.

No I am not going to try this.  This answer is my engineering best guess.

Popcorn is the only thing that would explode in a manner that you could recover something useful that I can think of.

Kellogg's has puffed wheat and puffed rice cereals.