Cook the noodles according to package instructions. Drain and set aside.

In a wok, heat sesame oil over medium-high heat. Add bell pepper, carrot, and broccoli. Stir-fry for about 5 minutes until tender.

Add the cooked noodles to the wok with the vegetables. Pour in the soy sauce, Sriracha, and rice vinegar. Toss everything together for another 3-4 minutes.

Garnish with green onions and sesame seeds before serving.