In a medium bowl, mix all sauce ingredients together and set aside.
PREPARE THE STIR FRY:
Place chicken in a mixing bowl and toss with the cornstarch until all is coated. Let sit for a few minutes.
Heat oil in a non-stick skillet over medium-high heat. Add the coated chicken and let it cook for 2 to 3 minutes, until browned. Flip and cook another 2 to 3 minutes, until browned. Remove chicken onto a plate.
Add the broccoli and bell pepper to the skillet and stir fry for 2 minutes. Add the chicken back into the skillet and pour on the sauce. Toss and cook for 1 to 2 minutes, until sauce thickens. Remove from heat, sprinkle with green onion and sesame seeds, and serve over rice.
Notes
*If you are preparing this recipe as gluten-free or dairy-free , just be sure to use brands of chicken broth, hoisin sauce and soy sauce that are known to be gluten free and/or dairy free.