@spendius,
Quote: If you cook any of them in anything else you don't have a tagine.
You've got your knickers caught in a semantic bind, Spendy, and not for the first time.
Not having the requisite Moroccan earthenware, I made it in an enamelled cast-iron Le Creuset casserole dish, which is no doubt something else you can grind your teeth about.
It turned out lovely, by the way. Chicken. I had it with some boiled new potatoes, which is probably plebeian enough for you.
I wouldn't put saffron in the next one btw, it's expensive and I'm not sure it did anything among the maelstrom of other more potent spices.