Strips of beef should be no thicker than 1/2 inch and no longer than 2 inches. Put it into a freezer bag (or medium bowl). 2 Tablespoons of soy sauce and 2 Tablespoons of cornstarch should be added and then placed away. For at least 30 minutes, let this marinade at room temperature.
Vegetables should be prepared and placed aside.
Making the sauce: Brown sugar, ginger, garlic powder, and 12 cup soy sauce are all combined in a whisk. Leave this alone.
In a sizable, deep skillet or wok, heat the oil to a high temperature.
Fry the meat for 3 minutes after adding half of it to the skillet. Take this meat out of the skillet, then fry the remaining pieces. After that, take it out of the skillet.
Except for the green onions, add the vegetables to the skillet and cook for 2 minutes.
Reintroduce the beef to the skillet after that. Heat the sauce thoroughly after adding it.
Top with the toasted sesame seeds and green onions.