Preheat your Traeger Flatrock griddle to medium high heat.
Only one zone is needed.
Assemble your ingredients.
In a jar, combine all of the sauce ingredients, including the corn starch.
Cover the jar and shake the sauce well.
To the hot griddle, add a bit of oil or nonstick cooking spray.
Then add the ground chicken and spread it as much as possible to increase surface area.
Sear the chicken for about 4 minutes, until it starts turning golden brown.
Using two spatulas, begin breaking apart the chicken.
Add the onion and garlic and continue cooking until those ingredients become translucent.
Continue mixing the ingredients and searing until the chicken is cooked through.
Pour the sauce over the cooked chicken and continue mixing with two spatulas.
Cook the chicken in the sauce for another 3-5 minutes until well combined and thickened.
Stir in the chopped orange peel and mix well.
Transfer orange chicken to a serving platter along with hot white rice.
Garnish with green onion and serve.