Cut chicken into bit-size pieces. Heat oil in a large skillet over medium heat; add chicken & onion. Saute for about 3 minutes. Add green beans, undrained tomatoes, carrots, potato, rice, salt & pepper. Mix gently. Pour water over top of chicken mixture. Cook, covered, over medium-low heat, stirring occasionally, for 20 minutes or until potatoes & rice are tender. Sprinkle with cheese and let stand, covered for 5 minutes.