In a small pot, combine ¾ cup of water, soy sauce, brown sugar, honey, garlic granules, and ginger. Cook on low heat for 5 minutes, stirring frequently to dissolve the sugar.
Combine the rest of the water and the cornstarch in a small bowl. Stir well with a whisk until no lumps remain.
Add the cornstarch mixture to the pot and reduce to a simmer for 15 minutes, stirring occasionally. It will slowly thicken.
Once thick, the sauce is ready to serve. If it is too thick, you can add a little more water.
Use as desired, and store leftover sauce in the fridge for up to 10 days.