Combine the base: Add soy sauce and water to a small bowl.
Dissolve the sugar: Stir in brown sugar until it begins to dissolve.
Add vinegar: Mix in the rice vinegar until evenly combined.
Add aromatics: Stir in the finely grated ginger and garlic.
Finish the sauce: Add toasted sesame oil and stir well.
Taste and adjust: Add a few drops of rice vinegar for more tang or a small pinch of brown sugar for extra sweetness.
Serve: Pour the ling ling potsticker sauce into small dipping bowls and serve with hot potstickers.