In a large pot of boiling water, cook the rice noodles according to package instructions until al dente. Drain and rinse under cold water to stop the cooking process. Set aside.
In a large wok or frying pan, heat the sesame oil over medium-high heat.
Add the grated ginger and minced garlic to the pan. Sauté for 30 seconds until fragrant.
Toss in the sliced red bell pepper, snap peas, julienned carrot, and shiitake mushrooms. Stir-fry for about 4-5 minutes or until the vegetables are tender-crisp.
Add the cooked rice noodles to the stir-fry and toss gently to combine, ensuring the noodles are evenly mixed with the vegetables.
Drizzle the soy sauce and rice vinegar over the noodle mixture. Stir well to coat everything evenly. Cook for an additional 2-3 minutes.
Remove from heat and stir in the sliced green onions and sesame seeds.
Plate the stir-fry and garnish with fresh cilantro and extra sesame seeds, if desired.