Used fresh red snapper for this, and it turned out very nicely. I upped the heat a bit using more jalapeno. My favorite part was the yogurt sauce, although I think I'll add a bit of sriracha sauce next time to add a bit more heat. I don't think the texture of cod would really work well in this, but haven't tried it. I used tortillas instead of taco shells as suggested by the poster, and topped with shredded cabbage and red onions. I'd like to try this with some guacamole and tomatoes as well. This was a very easy to make recipe for after work. Thanks for sharing your recipe! Made for PAC Spring 2011.