Cook noodles al dente, according to package directions, and set aside.
In a large wok, over medium high heat melt the butter. Add vegetables, and saute for 2-3 minutes until mushrooms and zucchini are tender. Add garlic and ginger, and saute until fragrant, about a minute.
Toss in noodles and stir to mix together.
Add sugar, soy sauce, and teriyaki sauce, and toss to combine.
Taste and season with salt pepper
Remove from heat and drizzle in sesame oil, add fresh scallions, and toss to mix.