In a large wok, bring water to a boil over medium-high heat. Add salt
Add green beans and cook for 8 minutes. Stir well.
Remove green beans from the wok and drain. Reserve 1/2 cup of the cooked water.
Remove all remaining water and heat wok again in medium-high.
Add oil then garlic. Cook until garlic is crispy.
Add green beans, the reserved water, soy sauce and onion.
Cook for 7 minutes while stirring.
Add sesame oil and stir. Remove from heat and serve!
Inspired by Maangchi.