Ginger scallion sauce is meant for a life of non-monogamy; it's too delicious to keep to your Hainanese chicken. Some ideas: Toss your noodles in it for a quick weeknight dinner. Drop a spoonful into your chicken salad spread. Use it to fortify a bowl of chicken arroz caldo. Make fried rice.
And to make ginger scallion sauce even better, we stirred in some fried and chopped chicken skin, creating a chunky condiment you could spoon over rice and call ulam. Imagine flavors of Hainanese chicken rice dressed in the textures of your favorite chili garlic crunch.
We originally made this as a garnish for chicken mami, but the concept of chicken skin ginger scallion sauce outgrew the dish. You really can't tie a good ginger scallion sauce down.