Shrimp Thermidor In Casserole
["1/2 lb. fresh mushrooms, sliced", "flour", "grated Cheddar cheese", "1/4 tsp. dry mustard", "3 c. cooked shrimp, cut in 1-inch pieces", "butter", "2 c. light cream", "2 Tbsp. dry white wine", "dash of cayenne", "1 1/2 tsp. salt"]
["Brown mushrooms in 1/4 cup butter.", "Stir flour into 1/3 cup melted butter until smooth.", "Gradually add cream.", "Cook over low heat, stirring constantly, until thickened.", "Simmer 3 minutes. Add 1/4 cup grated cheese, wine, mustard, cayenne, mushrooms, shrimp and salt.", "Mix well."]
["fresh mushrooms", "flour", "Cheddar cheese", "dry mustard", "shrimp", "butter", "light cream", "white wine", "cayenne", "salt"]