This is one of my personal favorites. I never measure anything for this, but it always seems to come out okay, if different every time. Therefore, the amounts given are only approximate, and the last few ingredients are optional. Mix ingredients in order given.
I like to serve this over stir-fried or steamed vegies with tofu which has been cooked with rice vinegar, soy sauce, garlic, and ginger... if the veggies are very hot the sauce doesn't need to be heated. I find it loses some of its flavor if it is mixed into the veggies before serving.