On July 1 California will be the first state in the nation to ban the sale, serving and production of foie gras. Jon Shook and Vinny Dotolo of Animal and Son of a Gun Restaurants say the ingredient is irreplaceable in the kitchen and Lesley Barger Suter of Los Angeles magazine questions who will be responsible for enforcing the ban. Speaking of illegal substances, Good Food producer Gillian Ferguson ventures to find out more about medical marijuana edibles. She watches as Joey - aka Big Sexy - of Big Sexy's Sinful Sweets makes cannabutter and attends a private dinner hosted by Nguyen Tran and Laurent Quenioux of Starry Kitchen in which the flavor of cannabis is the star of the show. Nancy Radke details how a series of earthquakes in the parmesan producing region of Italy has devastated parmesan producers. Jonathan Gold takes us to South LA for Yucatan food and Dr. Carson Chow spells out the mathematics of obesity. Plus, Good Food segment producer Laryl Garcia talks to Lesley Jacobs Solmonson about the history of gin.