Cook noodles as directed on package, omitting salt. Meanwhile, cook sausage, chicken and Cajun seasoning in large skillet 8 min. or until chicken is no longer pink, stirring occasionally. Remove meat mixture from skillet with slotted spoon
; set aside. Discard all but 1 Tbsp. drippings from skillet. Add vegetables and garlic to reserved drippings; cook and stir 4 to 5 min. or until vegetables are crisp-tender. Stir in meat mixture, 2 cups pasta sauce and 2 Tbsp. Parmesan.