Prepare noodles according to package directions (cook 4-6 minutes, or to taste); set aside. In large skillet or wok heat oil on medium heat until sizzling. Add mushrooms, spinach, bell pepper, zucchini, onion and garlic, and stir fry 3-4 minutes. Add soy sauce, sugar, chicken broth and noodles. Toss gently and heat through (approximately 1 minute). Immediately before serving pour your peanut sauce over top. Purchase Thai Peanut Sauce in oriental section of your grocery or at oriental market.