Prepare the Noodles: Cook the rice or egg noodles according to the package instructions until al dente. Drain and set aside.
Cook the Chicken: In a large pot or deep skillet, heat the vegetable oil over medium-high heat. Add the sliced chicken thighs and cook for about 5 to 7 minutes until browned and cooked through. Remove the chicken from the pot and set aside.
Add the Vegetables: Stir in the sliced bell pepper, snap peas, and broccoli florets. Cook for another 4 to 5 minutes, stirring occasionally, until the vegetables are tender but still vibrant.
Combine Chicken and Noodles: Return the cooked chicken to the pot, then add the cooked noodles.
Make the Teriyaki Sauce: In a separate bowl, whisk together the soy sauce, honey or maple syrup, rice vinegar, sesame oil, and cornstarch mixture. Pour the sauce over the chicken and noodle mixture in the pot.
Toss and Cook: Toss everything together to combine and let it cook for 2 to 3 minutes over medium heat until the sauce thickens and everything is heated through.
Serve: Remove from heat and serve the teriyaki chicken noodle stir fry hot, garnished with chopped green onions and sesame seeds.
Notes
Feel free to customize vegetables based on your preference.