Meanwhile whisk together the liquid aminos, pineapple, vinegar, garlic, ginger, and sesame oil in a saucepan. Bring to a boil. While waiting, stir the arrowroot powder and water together until mixed. Add the arrowroot water to the saucepan. Put the saucepan on medium heat and stir frequently as the sauce boils and thickens. Cook until thick, add the sesame seeds, then reduce to lowest heat to sit until ready to serve.
