Good-Cooking - Chicken Prosciutto with Mushroom Sauce

Ingredients

• 3 boneless, skinless whole chicken breasts
• 1/4 cup chopped onion
• 2 tablespoons Dijon mustard
• 1 cup heavy cream
• 1/2 pound fresh mushrooms, sliced
• 1 pound frozen broccoli
• Paprika
• 5 tablespoons butter or margarine
• 1/4 cup flour
• 1 cup chicken broth
• 1/4 cup white wine
• 4 ounces Swiss cheese, grated
• 6 thin slices ham (or prosciutto)