It goes in like liquid and you put the fixins inside and let it cook. You need a metal poker to turn it around. At a BBQ, you need to put the foil to keep the flame from going out and keeping the heat in.
Once you add everything in, you use the stick to clean off the sides of the circles. Remember to prime the takoyaki grill first. 30 minutes on a hot stove with oil.
Money Mark back from Bonnaroo. Here's when I saw him last. blog link.