Penne with Mushrooms and Prosciutto

Mushrooms and Prosciutto Ingredients: 1 tbsp unsalted butter 1 tbsp flour 1 cup chicken broth Salt Black pepper 1/2 tsp freshly milled black pepper 1/2 tsp freshly grated nutmeg 2 tbsp olive oil 3 tbsp unsalted butter 1 cup thinly sliced scallions 4 ounces thinly sliced prosciutto, diced 1 lb thinly sliced, trimmed mushrooms 1…