In a mixing bowl, mix together the Chicken Breast (2) and Teriyaki Marinade (2 cup). Let it sit for about 30 minutes to marinade.
Add some Vegetable Oil (4 tablespoon) to a cooking pan, and stir fry the chicken pieces for about 4-5 minutes.
In the same pan, cook the Onion (1), Red Bell Pepper (1), Yellow Bell Pepper (1) and Green Bell Pepper (1) together.
Then, add in the chicken into the pan and mix everything together.
Serve together with the Hoagie Roll (to taste).