Korean Marinated Beef

Ingredients:

• 1/4 cup soy sauce 
• 1 tablespoon sugar 
• 2 teaspoons sesame oil 
•  1 bunch scallions (white and pale green parts separated from 
•       greens), minced (1/2 cup) 
•  1 tablespoon minced garlic 
•  1 tablespoon minced peeled fresh ginger 
•  3 tablespoons sesame seeds, toasted 
•  1 lb. flank steak, cut across the grain into very thin slices 
•  1 tablespoon vegetable oil

     Stir together soy sauce, sugar, sesame oil, white and pale green scallions, garlic, ginger, and 2 tablespoons sesame seeds in a bowl until sugar is dissolved. Add steak and toss to coat, then marinate 15 minutes. Heat vegetable oil in a 12-inch heavy skillet over high heat until just smoking, then add steak in 1 layer and saute, turning over occasionally, until browned and just cooked through, about 5 minutes total. Transfer to a platter and sprinkle with scallion greens and remaining 1 tablespoon sesame seeds. Serve with white rice.