Chop the onions thinly then fluff them.
Place onions in a bowl, wash, and soak in water for 10 minutes. Set aside.
Mix all the sauce ingredients together. Mix thoroughly until the sugar has dissolved.
After 10 minutes, drain the onions and let sit for a while.
To serve, in a bowl, place a handful of onions and 3-5 tablespoons of the sauce.
Mix well, garnish with sesame seeds, and serve with Korean BBQ.
