Chicken Prosciutto With Mushroom Sauce
["3 whole chicken breasts, skinned, boned and halved", "5 Tbsp. margarine", "1/4 c. onion, chopped", "1/3 c. flour", "2 Tbsp. Dijon mustard", "1 c. chicken broth", "1 c. half and half", "1/4 c. dry white wine or water", "3 jars mushrooms, sliced and drained", "1 c. Swiss cheese, shredded", "16 oz. frozen broccoli cuts", "6 slices Prosciutto or thin sliced, cooked ham", "paprika"]
["Pound chicken breasts between 2 pieces of plastic wrap with meat mallet or rolling pin.", "Over medium heat, melt 2 tablespoons margarine.", "Cook chicken until browned (5 minutes)."]
["chicken breasts", "margarine", "onion", "flour", "mustard", "chicken broth", "white wine", "mushrooms", "Swiss cheese", "frozen broccoli cuts", "thin", "paprika"]