COOK noodles as directed on package.
MEANWHILE, melt butter in large skillet. Add mushrooms; cook and stir until tender. Stir in reduced-fat cream cheese and broth. Bring to boil; simmer on low heat 7 min. or until slightly thickened, stirring occasionally. Stir in turkey and peas; cook until heated through, stirring frequently.
DRAIN noodles. Serve topped with turkey mixture.