Thinly slice the flank steak against the grain, and then dice into smaller cubes. Place the steak in a bowl. (You can also cook an entire roast like tri-tip without slicing. Just make sure to increase the cooking time to account for the larger cut of meat.

Season flank steak with salt and pepper to taste, and coat with cornstarch. This dish is somewhat salty by nature, so go easy on the salt. Mix until well combined. (This is optional. If you're in a hurry, you can skip this step and still end up with a great meal.)

Mince your ginger and garlic.

At the bottom of the slow cooker, add the vegetable oil and cubed steak.

Add garlic, ginger, brown sugar, sesame oil, soy sauce and water. Mix thoroughly until ingredients are well combined.

Turn the slow cooker on high for 2.5 hours or low for 4-5 hours. Stir when done cooking.

Garnish with scallion and sesame seeds and serve over steamed white