The meat is thinly sliced, then marinated in a mixture of soy sauce, garlic, sesame oil and rice vinegar. The steak is then broiled while the marinade is allowed to boil for a few minutes and used as a sauce.
From the Family Circle cookbook
Serves 6
1/2 cup soy sauce
2 Tbsp sugar
2 Tbsp rice vinegar
4 cloves minced garlic
4 tsp sesame oil
1/4 tsp red-pepper flakes
1.5 lbs top round steak
1 bunch scallions
1.5 cups bean sprouts
2 red peppers, thinly sliced
1 head Boston lettuce
Whisk together soy sauce, sugar, vinegar, garlic, sesame oil and pepper flakes. Slice beef into 2-inch wide strips and add to marinade. Cover and refrigerate at least 1 hour. Cut scallions into 2-inch lengths, then cut each piece again lengthwise. Place scallions, bean sprouts and red peppers into separate serving bowls. Separate lettuce leaves and place in a separate serving bowl.
Heat oven to broil. Transfer beef to broiler pan rack and pour marinade into small saucepan. Broil beef for 5-6 minutes, turning over halfway though. Bring marinade to boil for 3 minutes, then pour into a small serving bowl. Assemble wraps and eat!