Step 1

Place the flank steak in a bowl with the cornstarch and toss to coat evenly.

Step 2

Add the flank steak to the slow cooker.

Step 3

Place the sesame oil, garlic, ginger, soy sauce, brown sugar and water in the slow cooker. Stir to coat the meat in the sauce.

Step 4

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

Step 5

Stir in the green onions, then serve.