A nondescript little stall just behind the busy Tai Po Market station, Grandma’s Tofu Fa has been around the neighbourhood for decades, serving her signature, sweet-but-simple make of either soybean milk or tofu pudding. It’s a no-frills kind of service with no seating available — just a simple bowl of silky-smooth pudding topped off with a scoop of yellow sugar that’s to be immediately slurped down while standing.