In a small saucepan, mix the water, soy sauce, and brown sugar until well combined.
Add the ginger, honey or maple syrup, and garlic. Cook over medium-high heat until the sauce comes to a boil, then lower the temperature to medium.
Meanwhile, in a small bowl, whisk together the cornstarch and water so that there are no clumps.
Add this to the sauce mixture and whisk together.
Cook for an additional 2-3 minutes, until the sauce starts to thicken.
Remove from heat and allow to cool.
Pour into a mason jar or airtight container for later use.