By Brigit Binns
Parboil the green beans
Bring a large pot of lightly salted water to a boil. Add the beans and cook for 2 minutes. Drain. Place under cold running cold water to halt the cooking. Pat the beans dry.
Make the sauce
In a small bowl, combine the broth, soy sauce, vinegar, cornstarch, and sugar and stir to dissolve the cornstar