Can you roast this on a half sheet in the oven, using entire recipe then cut into squares to serve as appetizers?

Sorry forgot the restrictions. Great suggestions-thanks and I'll report failures/success!

If you wanted to create a variant inspired by Okonomiyaki, I think you'd have to play around with it. It might work with or without the addition of a bit of baking powder (or soda??). or maybe separated eggs with the whites beaten. It won't be Okonomiyaki, as others said, it will be a different thing, but it would be yours. Maybe saute the cabbage first and drain very well. I would bake at 350. You want to decide how much ratio of egg based batter to solids you want. Maybe halve the basic recipe when you experiment (to halve 5 eggs, use 3 eggs or else 2 eggs then beat the 3rd egg in a small separate bowl and measure out by eyeballing about 1/2). Why not give it a try??

The real question is how will you cook the other side? Ask SKK says, okonomiyaki is a savory pancake. A big part of the delight of this dish is the crispy texture in contrast to the tender and succulent interior.

If you roast in the oven, be careful as it may start drying out very quickly.

It would be helpful to future readers if you report back on how you addressed the top side. Will you flip onto another sheet pan? Broil lightly?

Good luck!

Lucky enough to have lived in Tokyo. The question is would you roast a pancake? Okonomiyaki is a savory pancake. Okonomi means 'what you like' or 'what you want', and yaki meaning 'grilled' or 'cooked'. The little restaurants I ate Okonomiyaki in had tables with hot grills, and you mixed and added what you wanted and cooked them. Midge's recipe is the closest thing to Okonomiyaki I have tasted since leaving Tokyo. If you roast it, it will be a different item all together.