Deep frozen dim sums are handy to keep in the freezer. But they need a dipping sauce.
This one is easy and works perfectly for most dim sum:
50 ml. rice vinegar (I used a good quality Japanese white rice vinegar, there are many variations, some very strong, so taste and adjust the quantities)
50 ml. soy sauce (again, I used a standard Japanese soy sauce, you can use a Chinese 'thin' soy sauce)
1 teaspoon sesame oil
Mix and store in fridge.
Optional: dress up with fresh ginger (julienned), spring onion or chili pepper.