Cook the Noodles: Boil noodles according to package instructions. Drain and rinse with cold water to prevent sticking.
Prepare the Sauce: Whisk soy sauce, maple syrup, rice vinegar, peanut butter, sriracha, and cornstarch slurry in a small bowl. Set aside.
Sauté the Veggies: Heat sesame oil in a large skillet over medium-high heat. Add garlic and ginger, and cook for 30 seconds.
Stir-Fry the Vegetables: Toss in broccoli, bell peppers, carrots, snap peas, and mushrooms. Stir-fry for 3–4 minutes until slightly tender but still crisp.
Combine Everything: Add cooked noodles to the pan. Pour the sauce over and toss well to coat everything evenly.
Garnish & Serve: Sprinkle with sesame seeds, green onions, and crushed peanuts. Serve hot and enjoy!