In a small saucepan, combine soy sauce, 1 cup of water and/or juice, garlic, ginger, and brown sugar.
Turn the heat to medium and simmer the mixture while whisking for 2 minutes until the brown sugar has dissolved.
To thicken the sauce, in a separate small bowl, combine water and cornstarch to create a slurry.
While the sauce is at a low boil, slowly whisk in the slurry a little at a time until it reaches the desired consistency.
