If Peewee Dutch Yellow potatoes are unavailable, substitute baby Yukon Gold potatoes, cut into small wedges. Fresh breadcrumbs are best here, but you can substitute panko breadcrumbs as well. To make fresh breadcrumbs for this recipe, place one-quarter of a small sourdough boule in a food processor and process until to coarse crumbs. Fresh breadcrumbs can be stored in an airtight zip-top bag in the freezer. Just remove the amount you need and defrost before using.