Rick Moonen's catfish sloppy joe

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Next, Gayle places a bet on a childhood favorite with a shocking ingredient in Las Vegas. "I always loved sloppy joes as a kid. But every sloppy joe I have ever eaten my whole life always contained beef," Gayle says. "So we're here at the Mandalay Bay Resorts where chef Rick Moonen has a different idea."

The main ingredient in Rick's sloppy joe is U.S. farm-raised catfish. "I came up with a sloppy joe idea one day after I tasted catfish. It's not the kind of fish that pulls apart. It stays nice and meaty and firm," he says. "When you taste this, the catfish almost takes on a beefier texture. ... It doesn't fall apart."

When it comes time for the moment of truth, Gayle is still skeptical. As it turns out, the gamble was worth the risk. "Rick, I think you're onto something," she says.