Could this be the best burger in Bali' Cosmic Diner Bali is everything you could hope for; black checked floors, vinyl booth seats, wait staff in retro outfits straight out of Grease and art gallery worthy vintage posters covering the walls. The thick shakes are served in gimmick cowboy boot glasses, but there's also an entire menu of cold pressed juice. There's oozing mac' cheese and American style pancakes. Most importantly the Wagyu beef burgers are drool worthy; their secret ingredients are revealed at the top of the menu. Apparently it's a combination of organic chuck, brisket and short ribs that make them so tasty.