To prepare the long beans, cut the two ends off and then into 6-8cm pieces.
Add 1/2 teaspoon toasted sesame seeds with 1 tablespoon of sesame paste in a small bowl. And then add around 1 or 2 tablespoons of water, stir in one direction for minutes until all the ingredients combined well.
Bring a large pot of water to a boil, add around 1/4 teaspoon salt and then cook the long beans for 3 minutes (make sure the beans are well-cooked but still green). Transfer out immediately and soak in iced water. Drain completely after cool down.
Mix all the seasoning expect the sesame paste with the long beans. Give a big stir to make sure all the beans are well coated and the sauce is well absorbed.