Prepare noodles according to package directions. Toss with sesame oil to keep from sticking together. Set aside.
Prepare sauce. Combine all ingredients in a bowl. Set aside.
Heat 2 tablespoons of grape seed oil over high heat in a wok.
Add mushrooms and carrots. Cook for about 4 minutes, stirring constantly. Add remaining 2 tablespoons grape seed oil. Add pepper, zucchini, and onion; stir-fry for another 3 minutes. Add kale and scallions; stir-fry for another 2 to 3 minutes.
Add reserved noodles and sauce. Toss well to combine. Garnish with sesame seeds and serve.