Originally Posted By: OldBaldGuy
I too have heated with hot rocks, but never cooked. And you are right on about the rocks...

In 3rd or 4th grade, we did a "project" in class (read: the teacher did the work), where we heated the rocks, and then threw them into a bucket of soup. Worked rather well, actually. Just eat the soup around the rocks. Probably should rinse them first.

Not sure how any issues with rocks exploding was avoided. i throw this out here for contemplation only!