COOK pasta as directed on package, omitting salt. Meanwhile, brown meat in large saucepan on medium heat. Remove from saucepan; drain.
ADD peppers, garlic and oregano to saucepan; cook and stir 3 min. or until peppers are crisp-tender. Add meat and spaghetti sauce; bring to boil. Remove from heat.
DRAIN pasta. Add to sauce with Singles; stir. Top with mozzarella and Parmesan; cover. Remove from heat. Let stand 5 min. or until mozzarella is melted.