HEAT oven to 375°F. Cook chicken in dressing in large skillet on medium heat 2 min. Add cream cheese spread; cook and stir until melted. Add broth and vegetables; simmer 5 min.
POUR mixture into deep dish 9-inch pie plate. Invert pie shell over filling; flute edges. Cut 4 slits in shell to allow steam to escape.
BAKE 30 min. or until crust is golden brown.