If you're familiar with okonomiyaki, chances are you know it as a clean-out-the-fridge-franken-pancake stuffed with cabbage and a multitude of other ingredients, such as onion, scallions, pork belly or bacon, seafood, fish cakes, udon, mochi (rice cakes), and/or basically anything else you can think of. (As you might guess it's usually something you scarf down during a night of drinking.) Okonomiyaki are well loved all over Japan, but Hiroshima and Osaka are especially famous for their regional versions. There, these pancakes can grow to several inches in thickness and normally come garnished with copious squiggles of Kewpie mayo and Bull-Dog sauce, as well as katsuobushi (bonito flakes) that wave and wilt in the steam , as thought they have a life of their own.