Boil bean sprouts in water until they are just about to turn translucent. The bean sprouts should be soft to eat but still crunchy.
Drain the water and squeeze out any excess liquid.
Prepare the seasoning sauce by adding the remaining ingredients in a big bowl – garlic, green onions/scallions, salt, sesame oil, sesame seeds, and fish sauce. Mix them all together.
Add the cooked bean sprouts to the bowl and mix well. Can be served warm or at room temperature.