As I get boiling water in here, what I'm going to do is take some of these rocks out and replace it with an egg. This is going to be how to boil your eggs. You want to boil for, I don't know, three minutes or so.
You've got a really hard rolling boil going with our eggs. One of the other ways you can cook with your rock boil is you can lay grass over the top and lay vegetables or any other items you want to steam on top. It doesn't have to be grass. It can be sticks. You can lay sticks over the top and put your greens or whatever vegetables--say you're steaming dandelion greens--you can put those over the top. Cattails you can put them over the top.
You can also roast some of those in the fire. This is a nice bamboo steamer. Just put whatever plant material you have over the top and put your things that you want to steam on top. There you go.