Slowly working my way through the mall adjacent to the new San Gabriel Hilton on Valley Blvd., I came across a nearly hidden store called Pa Pa Walk, which initially looked like a typical boba/snack place. However, it seems to be more than that, though I'm not sure what. The menu includes "Nan Yang Dessert" items, Nan Yang style soup, plus Taiwanese Shaved Ice. Black glutinous rice porridge shows up twice on the menu, once as a Nan Yang Dessert, again as a hot drink. Anybody know what this stuff is?