Wash and trim the beans. Cut in 4 to 6 inches pieces.
Add the sesame oil to a pan and the garlic. Brown slowly on medium heat. Add the beans. Shake a couple of times. Add the soy-sauce, the fish sauce and the lemon juice. Simmer for 7 to 8 minutes until cooked but still crunchy. Season with salt and pepper and add the cilantro.