I've had them in Mexico before and I hear there's a cantina in Los Alogodones that makes excellent ones. i've seen lots of recipes, but what I liked was a white fish cooked like chicken tenders (strips fried with a coating), laid into a flour or corn tortilla. They had a little cabbage slaw type of stuff (no mayo) and a sauce that I'm still trying to figure out. It was a cream sauce with a slight blush to it. That's all I know. They were awesome!!! i'm hoping the ones at the cantina are made the same....if so, I'll be asking for recipes....!!! LOL