Step 1

Place the flank steak and cornstarch in a bowl, stir to coat the meat evenly.

Step 2

Place the meat in a slow cooker.

Step 3

In a small bowl, whisk together the sesame oil, rice vinegar, garlic, ginger, beef broth, soy sauce and brown sugar.

Step 4

Pour the sauce over the meat and stir to combine.

Step 5

Cover the slow cooker and cook on LOW for 4-5 hours or HIGH for 2-3 hours.

Step 6

Sprinkle with sesame seeds and green onions, then serve.