Three pastries? No, just one: Those scallion-laden oblongs, doughy little buns, and griddled disks are in fact the same snack at three stages of its "life cycle," under the loving upbringing of a husband-and-wife team. The fourth stage, after it's completed a metamorphasis into a crispy scallion pastry (Y0.5 each), is, inevitably, to fall prey to one of the many pastry predators lurking about.
Griddled-Pastry Stand
Near Dongjiadu Lu, Shanghai
