Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente. Drain and set aside.

Heat a wok over medium-high heat and add a splash of oil. Add the chicken and shrimp, stir-frying until cooked through, about 5-7 minutes.

Add the bell peppers, carrots, and broccoli to the wok. Stir-fry for another 3-4 minutes until the vegetables are tender-crisp.

In a small bowl, mix the soy sauce, oyster sauce, sesame oil, and cornstarch mixture. Pour over the stir-fried ingredients and toss to coat.

Add the cooked pasta to the wok and toss everything together until well combined. Cook for an additional 2 minutes.

Serve hot, garnished with green onions and toasted sesame seeds.