I love dumplings. Tender little pillowy clouds of dough floating on simmering gravy...what's not to like? There seems to be two kinds of dumplings in American cooking - rolled dumplings, and drop dumplings. My mom always made the drop kind, so I do, too. Some people think that drop dumplings are heavier and denser than rolled dumplings, but if they can be light and fluffy if you don't mix the batter too much and if you give it time to rest before you drop the batter into the gravy. Here's…