If you've ever walked around Pier 39 in San Francisco or made a late-night exit from a concert at the Greek Theatre in Berkeley, you're probably familiar with the bacon wrapped hot dog. But who are the vendors behind these savory snacks? And what's with the bacon and onions? Bay Curious listener Olivia Godfrey wanted to find out more.

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This story was reported by Azul Dahlstrom-Eckman. Bay Curious is made by Katrina Schwartz, Gabriela Glueck and Christopher Beale. Additional support from Olivia Allen-Price, Jen Chien, Katie Sprenger, Maha Sanad, Alana Walker, Holly Kernan and everyone on Team KQED.