PREHEAT oven to 350°F. Melt butter in large skillet on medium heat. Add vegetables; cook and stir until crisp-tender. Add cream cheese and milk; cook on low heat until cream cheese is melted, stirring frequently.
ADD ham and 1/4 cup of the Parmesan cheese; mix until well blended. Stir in sauce and noodles; spoon into 1-1/2-qt. casserole dish. Sprinkle with remaining 1/4 cup Parmesan cheese.
BAKE 25 to 30 min. or until heated through.