Combine the tamari, rice vinegar, and sugar in a small bowl or measuring cup and stir to combine.

In a separate bowl, stir together the arrowroot powder and water so that there are no lumps.

Pour the arrowroot slurry into the tamari mixture and stir to combine.

You can either warm over the stove in a small saucepan or in the microwave. For the stovetop: heat on medium heat for 1-2 minutes or until the sauce begins to thicken. For the microwave: cook on high power in 30 second intervals until the sauce thickens.

Serve atop your favorite protein, veggies, or stir fries. I find this amount gets me 1-2 servings or a stir fry for 2.