Hands On: 20 minutes Total: 30 minutes Cook rice according to package directions. Heat oil in large skillet over medium-high heat while preparing rice. Add onions, mushrooms and zucchini; cook 3 to 5 minutes, or until vegetables are crisp-tender, stirring occasionally. Add chicken; cook 5 to 7 minutes, or until chicken pieces are no longer pink in centers, stirring occasionally. Add diced tomatoes with their liquid, the tomato paste, salt and pepper; stir. Cook until heated through, stirring occasionally. Serve over the rice.