Combine The Soy Sauce, Sesame Oil And Rice Vinegar In A Small Bowl. In A Small, Heavy, Dry Skillet Over Medium Heat. Add The Sesame Seeds And Stir Until They Darken A Bit. Remove And Crush Seeds. Add To Soy Mixture With Sugar And Scallions. You Can Increase Recipe Amounts To Make As Much As You Need. I Usually Make At Least 6 Times Amount And Store In Fridge.