Gather all your ingredients on the countertop for easy access.
In a small bowl, whisk together the cornstarch and brown sugar to prevent clumping.
Pour in the low-sodium soy sauce, water, minced garlic, minced ginger, sesame oil, and rice vinegar into the bowl with the dry ingredients.
Using a whisk or fork, mix everything together until smooth and the cornstarch is fully dissolved.
Taste the sauce and adjust sweetness or acidity as desired.
You can use the sauce immediately or store it in an airtight container in the refrigerator for up to a week.
