I wanted to try making CHAR SIU Bao at home. But I don't like the CHAR SIU meat they make because of the added food color. When I found the pork shoulder meat at COSTCO, I thought, I would give it a try. Here is the photo journal of the process.
I marinated the pork shoulder meat in brown sugar, soy sauce, Tonkatsu sauce, wine, and some salt.
Making the TSA XIAO Roux.
Stir fry the vegetables you want to add, if any. These are chopped onions and bell peppers.