Heat oil in non-stick skillet over medium-high heat. Add chicken and cook for about 3 minutes, stirring occasionally.
Add vegetables and salt and pepper and cook an additional 3 minutes. Transfer chicken vegetable mixture to a bowl. Set aside.
In the same skillet, add remaining ingredients for the sauce. Whisk until combined. Bring to a boil and cook for 5 minutes, until the sauce has reduced some.
Add chicken and vegetables back to the pan. Cook an additional 2-3 minutes. Serve with fresh orange slices and brown rice.
Recipe by Mom to Mom Nutrition at https://momtomomnutrition.com/food-and-recipes/orange-chicken-stir-fry/