COOK tortellini as directed on package, omitting salt.
MEANWHILE, heat oil in large skillet on medium-high heat. Add chicken; cook and stir until lightly browned. Add peppers; cook and stir 1 to 2 min. or until peppers are crisp-tender and chicken is done. Stir in sauce; simmer on low heat 2 min. or until heated through, stirring occasionally.
DRAIN pasta. Add to chicken mixture; mix lightly. Sprinkle with cheese.