Marinate the chicken in the teriyaki sauce overnight in the fridge. (I just placed both in a zipper top bag and laid it flat on the fridge shelf)
Steam the riced cauliflower separately on the side as you prepare the rest of this dish.
Chop the chicken into bite-sized pieces. The smaller they are, the faster they will cook.
In a wok or skillet, warm the oil and add the chicken. Cook until the chicken is well browned and about half way cooked.
Stir in the broccoli, carrots and mushroom.
Continue to cook until the chicken is done.
Just before turning off the heat, stir in the green onions.
Serve a third of the chicken over 1/2 a cup of the riced cauliflower and if you prefer, sprinkle a little extra teriyaki sauce over the top to really make the flavors pop!
Notes
Please note that the nutrition data below is a ballpark figure. Exact data is not possible. The data here does not include the teriyaki sauce.