Forget lobster rolls and crab cakes. The dish East Coast residents really clamor for are clam cakes and fritters. In Maine, it's a deep-fried clam patty; in Virginia, a clam-filled pancake; in Southern New England, clam doughnut holes that are a summer sacrament despite their bad nutrition, frequent greasiness and limited availability (or actually, maybe, because of those things). The Great Clam Cake and Fritter Guide digs into the origins of these...