Thanks for the input! As I was getting everything ready to go (I figured I could make the starter now and then bake it tonight) I realized that it calls for chopped croissants. How weird is that!! I'm going to have to wait to try it 'cause I don't have that or the rice flour on hand.
I got sunburned really, really, really bad on Sunday and I still can't put a shirt on - so I can't go pick up ingredients. I found a rustic italian bread which I have items for, so I'll use that one -- but I'll be thinking about that crackle bread the whole time!