HEAT oven to 350°F.
HEAT dressing in large skillet on medium heat. Add chicken; cook and stir 8 to 10 min. or until done. Add vegetable blend, corn, cream cheese and bacon; cook 3 to 5 min or until cream cheese is melted.
SPOON chicken mixture into 2-qt. casserole. Mix crackers, flour, butter and egg; sprinkle over chicken mixture.
BAKE 30 min. or until heated through. Cool 10 min. before serving.