In a small bowl, whisk together the stir fry sauce ingredients. Set aside.
Cook the rice noodles according to the package. Once cooked, rinse with cold water to prevent them from sticking. Set aside.
Add the olive oil to a large frying pan and sauté the onion over medium-high heat until soft and starting to brown, about 5 minutes.
Add the carrots, green and red bell peppers, ginger, and garlic. Cook for an additional 2-3 minutes.
Add the snow peas and broccoli to the pan and cook for another 2 minutes, until the vegetables are tender but still crisp.
Add in the cooked rice noodles and the stir fry sauce, toss to combine and cook for an additional 1-2 minutes until thickened.
Drizzle the toasted sesame oil over the top and give everything one last toss. Garnish with sesame seeds and sliced green onions, and enjoy!