Pound pork slices with a meat mallet to 1/2-in. thickness; sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper. In a large skillet, heat 1 tablespoon butter over medium-high heat. Add pork in batches; cook 2-3 minutes on each side or until pork is golden brown, using 1 tablespoon butter as needed. Remove; keep warm.
In same pan, heat remaining butter over medium heat. Add mushrooms, celery, and remaining salt and pepper; cook and stir 6-8 minutes or until tender. Add broth, stirring to loosen browned bits from pan. Bring to a boil; cook 5-6 minutes or until liquid is reduced to 2/3 cup.
Return pork to pan. Stir in cream and 2 tablespoons parsley; heat through. Serve with noodles; sprinkle with remaining parsley.