Chicken And Broccoli Au Gratin
["2 pkg. frozen broccoli (or 1 bag)", "2 whole chicken breasts, cooked and cut into pieces", "1/4 c. margarine", "1/2 tsp. salt", "dash of pepper", "1/4 c. flour", "1/2 tsp. dry mustard", "1 c. chicken broth (from cooked chicken, add water to equal 1 cup)", "1/2 c. milk", "1 c. cheddar cheese, shredded", "grated parmesan cheese"]
["Cook broccoli, drain and set aside.", "Melt margarine in flour, salt, pepper and mustard.", "Stir in chicken broth and milk.", "Cook over medium heat, stirring constantly, until sauce thickens and bubbles.", "Add cheese and stir until cheese is melted."]
["frozen broccoli", "chicken breasts", "margarine", "salt", "pepper", "flour", "dry mustard", "chicken broth", "milk", "cheddar cheese", "parmesan cheese"]