If using frozen edamame, cook in boiling water for 3-5 minutes until tender. Drain and set aside. If using fresh edamame, steam or boil until soft, approximately 5-7 minutes.
In a large skillet, heat the sesame oil over medium heat. Add the minced garlic and sauté until fragrant, about 1-2 minutes. Be careful not to burn the garlic.
Add the cooked edamame to the skillet, along with the soy sauce, red pepper flakes, and rice vinegar. Toss everything together and cook for another 2-3 minutes, allowing the beans to absorb the flavors.
Season with salt to taste, and adjust red pepper flakes for your desired spice level.
Remove from heat and transfer to a serving bowl.
Garnish with toasted sesame seeds and finely sliced green onions before serving.
Notes
Serve the edamame in a rustic bowl, with toothpicks on the side for easy eating. A sprinkle of extra sesame seeds on top adds a nice touch!