I've never used one myself, but I'd imagine they are used a lot in Indian and Moroccan cooking. What about a tandoori recipe or some curry recipes/
This seems to have a few -
http://www.recipezaar.com/r/q=tajine
I think once you master the cooking times, then you can start adapting othre recipes to it.
Madhur Jaffrey has been around forever as an author of Indian cookbooks -- Your local library might have a cookbook or two of hers with some recipes