1) Combine 1 cup water, tamari, brown sugar, garlic and ginger in a saucepan and bring to a boil, stirring constantly.
2) Dissolve cornstarch in 1/4 cup of cold water and add to sauce.
3) Stir constantly to allow the sauce to thicken.
4) If the sauce is too thick add a little water or tamari to thin.
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