MELT butter in medium saucepan on medium heat. Add onions and garlic; cook and stir 3 to 5 min. or until fragrant. Add broth and crushed pepper; bring to boil. Whisk in Neufchatel; cook and stir on low heat until Neufchatel is melted and sauce is well blended.
COOK pasta as directed on package just until al dente. Meanwhile, stir peas and 1/3 cup Parmesan cheese into sauce; cook 2 to 3 min. or until slightly thickened.
DRAIN pasta. Place in large serving bowl. Add sauce; toss to coat. Top with ham and remaining Parmesan.
