In a large bowl, mix gf soy sauce, ½ tbsp garlic, pepper flakes, and brown sugar. Stir until sugar is dissolved and mixture is uniform.
Add drained/dried green beans, and toss to coat in sauce.
Heat sesame oil in a pan/wok on medium-high heat. When tiny bubbles start to form in the oil, add remaining minced garlic and cook until fragrant.
Pour green beans/sauce into the heated, oiled pan. Using a spatula, spread green beans out in a more or less even layer in the pan. Cover, and let cook for about 3-5 minutes.
Stir/toss green beans to avoid burning, then cover and cook for another 3-5 minutes, until your green beans get soft and you start seeing browned bits at the tips.
Enjoy immediately, over a bowl of rice.