I tried one today at lunch. Waiter looked at me kinda funny, but shrugged and then wheeled it out on the tray. Thing was the size of my own body! I couldn't finish it all, so I had to give the rest of it to the Galka sitting next to me.
I don't know what they put in those things, but very tasty. Stats on them are Int+10, MP+40, MP+35%, lasts one hour. Very good mage food. I guess that's why all the galkas eat them too, good boosts for galka mages.