Heat oil in skillet on medium-high heat. Add chicken pieces to the hot oil, cook and stir for about 5 minutes. Add the frozen vegetables to the pot. Stir and cook until vegetables are tender and chicken is cooked through. About 5 minutes. Stir in the sauce, and bring to a boil. Reduce the heat, and simmer for about 1 minute or until heated through. Serve with rice. Enjoy!