Thinly cut the flank steak against the grain, and then dice. Put the steak in a bowl.
1 lb Flank Steak
Season flank steak with salt and pepper to taste, and coat with cornstarch. Mix until well combined.
Salt, Black Pepper, ¼ Cup Cornstarch
Mince your ginger and garlic.
3 cloves garlic, 1 inch ginger root
At the bottom of the slow cooker, add the vegetable oil and then add the steak.
2 Tablespoons Vegetable Oil
Then add the garlic, ginger, brown sugar, sesame oil, soy sauce and water. Mix until well combined.
⅓ Cup Brown Sugar, 1 Tablespoon Sesame Oil, ½ Cup Soy Sauce, ¼ Cup Water
Turn the slow cooker on 2.5 hours on high or 4-5 hours on low. Then stir when done cooking.
Slice the scallion.
Garnish the Mongolian beef with scallions and sesame seeds and serve over rice.
1 bunch scallions, 1 Tablespoon sesame seeds