@farmerman,
I've never used a clay pot, as I've been unlucky in my thrift shop searches for one.
On reading the Guardian article's comments section, I see the spanish tend to use pressure cookers for the same tagines (there are many kinds). Besides, I'm caught up in some tangle of my own mostly italian cooking and my present interest in new mexico/mexican cooking, leaving me making strangely spicy pizzas and pastas. Luckily this all gives me lots jarred leftover sauces to confuse myself with.