Just like any other DIN TAI FUNG restaurants, they give you a piece of paper where you check and write down your orders. Granted that it seems quite incredible to charge for extra ginger, I just went with the flow.
Since this wasn't my first time eating in a DIN TAI FUNG, I figured I let my friends do the ordering. They went with the go to choices of course. From the original xiao long bao, to the crab roe flavored version, and even some other dishes.
Disclaimer: paid for the meal. wrote this based on my experience.