I have been baking bread in a cast iron Dutch oven, but the loaves are round because of the shape of the pot, and I don't find them completely suitable for sandwiches. But I got a Romertopf unglazed clay baker ~ don't think it was ever used ~ from a thrift shop in San Jose on my last trip to California. Brand new, it's priced at US$59 plus shipping. I got it for just an odd cent over US$4, and carried it home as hand luggage safely bubble-wrapped. How's that for a bargain? I baked an Italian semolina loaf in it yesterday. Had a toasted cheese and mango chutney sandwich this morning.