1 Heat wok or large pan over high heat. Mix soy sauce, vinegar, sesame oil and arrowroot in a bowl, set aside. Add oil and onion, saute for 2 minutes. Add garlic and ginger, stir until frargrant. 2 Add baby corn and mushrooms and broccoli. Stir until beginning to turn color. Add noodles and then sauce, mix up until it is all incorporated. 3 Serve hot.