COOK pasta as directed on package, omitting salt.
MEANWHILE, heat oil in large skillet on medium-high heat. Add chicken; cook 8 to 10 min. or until no longer pink, stirring frequently. Add peppers and mushrooms; cook 3 min., stirring occasionally. Stir in tomatoes and dressing; simmer on medium-low heat 5 min. or until chicken is done, stirring occasionally.
DRAIN pasta; toss with chicken mixture. Top with cheese and basil.
serving size = 1-1/2 cups (375 mL)