Traditional Japanese okonomiyaki pancakes get a sourdough makeover. Okonomiyaki is a griddle-cooked pancake made with a savory, egg-based, wheat flour and cabbage batter. Okonomiyaki can be customized with endless seafood, meat, vegetable, and traditional Japanese toppings. Here’s a little-known fact about me — I’ve visited the tradition-rich Kansai region of Japan and eaten real okonomiyaki from …