I bake mine in a Dutch oven with the lid on for 25mins @ 230C then take the lid off and bake at 220C for 20mins and it comes out lovely. I like a dark crust but if you prefer less colour take it out after 15mins or so. Let it cool first before you cut it.
I use one already, it was just a left it to rise in the fridge overnight and the cold dough took ages to cook through!