Nagoya(ish) style okonomiyaki:

>0.5 cup flour
>3/8 cup dashi
>1/8 cup mirin

Mix to make dough.

>120g cabbage, somewhat thinly sliced
>0.5 spring onion, thinly cut

Mix together.

>3 tbsp ketchup
>1 tbsp Worcestershire sauce
>1 tsp soy sauce

Mix together for quick okonomiyaki sauce. Gets better if it's given an hour or two of resting time for flavors to mingle.

>1 egg
>some bacon strips

Pour a bit more than half the dough onto a preheated greased grill/pan and spread thin. Put cabbage and onions on top, and make a little pool in the middle and crack an egg into it. Cut the egg and mix carefully with the middle and upper layer of the cabbage mix. Sprinkle a little bit of salt on top and lay bacon strips on top. Pour the rest of the dough on top.
Cook for 5 minutes or until the lower pancake seems browned. Then flip in a quick motion and pat the back a bit to compress. Cook for five minutes or until bottom is nicely browned.
Flip again, slather the top with a thin film of okonomiyaki sauce and, if available, apply katsuobushi shavings. Enjoy.