Gumbo isn’t a classic slow-cooker recipe, but chef Grant Achatz say it’s a “no-brainer.” His version is packed with spicy andouille sausage, okra, shrimp and crab. “Given the many regional variations, I think it’s fair to say that you should put whatever you want to eat in your gumbo,” Achatz says. Slideshow: How to Make Gumbo