Step 1

Toss the beef in the cornstarch and place in the fridge for 10 minutes while you are making the sauce and heating up the oil.

Step 2

Heat 2 tablespoons of oil in a large skillet.

Step 3

When the oil is nice and hot add in the steak (I had to do two batches to avoid overcrowding the pan). Sauté until browned on both side, 3-4 minutes. Remove from the pan and set aside.

Step 4

Add the remaining tablespoon of oil to the same pan.

Step 5

Add in garlic and ginger and cook for 1-2 minutes.

Step 6

In a small bowl combine soy sauce, mirin, brown sugar, sesame oil and fish sauce.

Step 7

Pour the soy sauce mixture into the pan and bring to a simmer and cook for 2-3 minutes.

Step 8

In a small bowl mix together the cornstarch and water.

Step 9

Slowly pour in the cornstarch mixture whisking continuously. Continue to cook until your desired thickness.

Step 10

Add steak back to the pan and toss to coat the beef with the sauce.

Step 11

Serve immediately with green onions and sesame seeds if desired.