Blanch. Bring a large pot of water to a boil. Meanwhile, prep an ice bath in a large bowl. Once boiling, add the green beans (1 pound) and blanch for 1 minute, then transfer directly into the ice bath. Wrap green beans in a kitchen towel and dry completely -- I usually do this an hour before, so they can completely dry (otherwise the oil will splatter in the next step_.
Stir fry. We'll work quickly once the oil is hot, so prep all remaining ingredients and have them ready next to your stove. Heat oil over high heat in a large pan or wok. Once shimmering, add the green beans and toss to coat for 1 minute. Add the garlic (1 tablespoon) and ginger (1 tablespoon) and stir constantly so they don't burn. As soon as you smell the garlic (about 1 minute) add the soy sauce (1 1/2 tablespoon) and Shaoxing wine (1 tablespoon). Cook until the beans have softened to your liking - this was about 3-4 minutes for me.
Finishing up. Remove green beans from heat and add the red pepper flakes (1/4 - 1/2 teaspoon) and sesame oil (1 teaspoon). Toss to coat, and serve.