In 2-quart saucepan, heat 1 2/3 cups hot water and uncooked rice (from Chicken Helper box) to boiling, stirring occasionally. Reduce heat; cover and simmer about 10 minutes or until liquid is absorbed.
Meanwhile, in 10-inch skillet, heat oil over medium-high heat. Cook chicken in oil 3 to 5 minutes, stirring occasionally, until outside of chicken turns white. Stir in seasoning mix (from Chicken Helper box), 1/4 cup water and the vegetables; heat to boiling.
Reduce heat; cover and simmer about 6 minutes, stirring occasionally, until vegetables are crisp-tender. To serve, spoon chicken mixture over bowls of hot rice.