COOK pasta as directed on package, omitting salt.
MEANWHILE, cook reduced-fat cream cheese, garlic and milk in large skillet on medium heat 1 to 2 min. or until cream cheese is completely melted and mixture is well blended, stirring frequently. Add 1/4 cup Parmesan, spinach, bell peppers and crushed pepper; mix well. Cook 2 min. or just until spinach starts to wilt.
DRAIN pasta. Add to cream cheese sauce; toss to coat. Top with remaining Parmesan.