Mario Batali and Tony Bourdain are a couple of champion fat chewers who know and like and respect each other a great deal, so we thought why not bring them together for the next set of Chewing the Fat episodes. Mario Batali and Anthony Bourdain discuss their four essential ingredients. What are yours? The new season of Tony’s show No Reservations airs Mondays at 10 p.m. ET on the Travel Channel. Mario's show, Spain...On the Road Again, co-starring Gwyneth Paltrow and Mark Bittman, continues on PBS.