The mango desserts we had at Cong Sao 聰嫂星級甜品 in Causeway Bay were great:
楊枝甘露 Sweet mango soup (with tapioca)
芒果奶昔雙皮奶 Mango Milkshake with Milk Clot. The milk clot is a milk custard at the bottom of the bowl, with the cool mango cream/ milkshake on top.
The Andy Lau calligraphy on the wall was rumored to be a reproduction. The original was said to be at the main shop. Nonetheless the guy’s got some good calligraphy.
(below picture credit goes to @Rheeta_10 on Twitter)