Besides snails, for me it's probably menudo. I actually love menudo, its an acquired taste for non-Mexicans though, and I didn't like it the first time I tried it. It consists of hominy and various cow stomach parts, in a tomato-chile broth. It's actually quite healthy, and is the cure for the hangover (it really does work!) I tried to get my sister to try it when she was very hung over after my niece's bachelorette party, but she was grossed out by it instantly and refused to even try it. I guess it's not for everyone.
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