Bring a pot of water to a boil and cook the noodles according to the package directions. Drain and set aside.
In a small bowl, whisk together soy sauce, honey, rice vinegar, cornstarch, garlic, ginger, and water until well combined.
Heat oil in a large pan or wok over medium-high heat.
Add the sliced chicken and cook for 5 to 6 minutes until fully cooked and lightly browned.
Pour the prepared teriyaki sauce over the chicken and stir well.
Reduce heat to medium and simmer for 3 to 4 minutes until the sauce thickens.
Add broccoli, carrot, and bell pepper, stirring for 2 to 3 minutes until slightly tender but still crisp.
Add the cooked noodles to the pan and toss until evenly coated with sauce.
Remove from heat and garnish with spring onions and sesame seeds.