Cook noodles according to package directions. Meanwhile, in a saucepan, melt 1 tablespoon butter; stir in flour until smooth. Gradually add milk. Bring to a boil over medium heat; cook and stir for 2 minutes or until thickened. Remove from the heat; stir in cheese until melted.
Drain noodles. Add the noodles, ham and peas to cheese sauce. Pour into a 3-cup baking dish coated with cooking spray. Melt remaining butter; toss with bread crumbs and parsley. Sprinkle over the top.
Bake, uncovered, at 350° for 30-35 minutes or until heated through.