Add 1 tablespoon oil to the chicken and mix well.
Set a large skillet or wok on the stove, and set the heat to medium-high heat and wait for it to get hot. Then add in oil once the pan is hot.
Add the ginger to the pan, and stir fry it for 1 minute until it is golden color, then add in the garlic slices and stir fry it for 20 seconds.
Add the marinated chicken to the pan and stir fry until it is cooked through for about 3-4 minutes
Add the sliced onions and peppers and stir-fry it for 20-30 seconds.
Stir the pepper sauce in the bowl, the cornstarch settles to the bottom.
Set the stove to high heat, push the chicken and veggies to the side of the pan, pour in the sauce mixture, and immediately start stirring. Keep stirring until it simmers and thickens.
Finally, add in the green onions and mix everything together in the pan so that the sauce coats the chicken and veggies evenly.
Do a taste test. If you want it more peppery, add an additional ½ teaspoon of ground pepper. Turn off the heat and serve!
Enjoy with Rice!