Tender and nutty sheets of cauliflower, held together with eggs and plenty of ginger and scallions, form the base of this savory pancake. Use a thin, flexible fish spatula to transfer the okonomiyaki from the pan to the sheet tray and back again; its wide surface area makes it easy.
Roasted hazelnuts can be stored in an airtight container at room temperature up to 5 days; bulldog sauce and yuzo kosho mayonnaise can be stored in airtight containers in the refrigerator up to 5 days.
Kewpie mayonnaise and yuzu kosho can be found at Asian markets or online at amazon.com. To drizzle sauce and mayo, use a small squeeze bottle, or use a ziplock plastic bag with a small hole cut in one corner.