Finely slice the green onions, including white and green parts. Set aside.
Grate the ginger; I often don't even bother to peel it. This handy dandy white grater in the photo below is perfect for this task. You can usually find them in Asian grocery stores. Add grated ginger to the green onion.
In a large frying pan, heat the oil over medium heat.
Once the oil is shimmery but not smoking, add the green onion and ginger.
Cook the green onion and ginger for one minute; you can add some salt to taste, if you'd like.
Remove the pan from the heat and let cool.
Store in the fridge for up to 1 week.
Recipe by Kiku Corner at https://www.kikucorner.com/2014/10/31/chinese-ginger-green-onion-sauce/