Add the chicken breasts, onions and bell pepper to the bottom of a slow cooker.

Mix together the soy sauce, honey, ketchup, garlic and sesame oil in a bowl until well combined.

Pour the sauce over the ingredients, and stir to combine.

Cook on high for 4 hours.

When the slow cooker time is almost complete, boil the noodles until done to your liking. Drain well and set aside.

Stir together the cornstarch and water in a bowl.

Pour the cornstarch mixture into the slow cooker, and stir to combine. Let sit on the warm setting until thickened.

Stir in the noodles, garnish with green onions and serve.