When I was a small kid... around 4 or 5. My grandaunt used to buy sweet potato balls from an elderly neighbour for my breakfast. This neighbour, whom we call as "Sou Cheh 苏姐' is a single lady, in her 70's with an adopted son. She sells traditional Cantonese snacks in the market, like sweet potato balls, jeen doy (煎堆 sesame balls) and dan shan (蛋散 syrupy egg crackers) to make a living.