Heat the toasted sesame oil in a large skillet over medium heat. Add the green beans, crushed red pepper flakes, and freshly cracked black pepper to taste. Cook, stirring occasionally, for 4-5 minutes or until crisp-tender and vibrant green.
Add the minced garlic, and cook, stirring constantly, for 1 minute.
Add the soy sauce and butter, and stir evenly, coating the green beans.
Sprinkle the tops with toasted sesame seeds. Serve & enjoy.