Yukon gold potatoes have a sweet, butter-yellow flesh and golden-brown peel. Their waxy texture makes them perfect for roasting or boiling and mashing.
Wasabi, also known as Japanese horseradish, is a fiery-hot Asian root. Fresh wasabi is sold at Asian markets and co-ops. Look for wasabi powder near the Asian products at the grocery store.
For easy cleanup, roast the potatoes on parchment paper cut to fit the cookie sheet.
Prepare this recipe up to a day in the advance; cover and refrigerate it.