TOSS chicken with 1 tsp. Cajun seasoning. Mix cream cheese spread and 2 Tbsp. milk until blended.
HEAT oil in large skillet on medium heat. Add chicken and vegetables; cook 6 to 7 min. or until chicken is done and vegetables are crisp-tender, stirring frequently. Add sausage; cook 3 min., stirring frequently.
ADD cream cheese mixture, remaining milk and seasoning; cook and stir 2 to 3 min. or until heated through.
STIR in pasta.