Chicken Tetrazzini(Cooking Light)  
["1 Tbsp. margarine", "3 c. presliced fresh mushrooms", "1/3 c. minced onion", "1/2 c. all-purpose flour", "2 1/3 c. canned no-salt-added chicken broth", "2 c. skim milk", "1/4 c. light process cream cheese product", "1/4 c. grated Parmesan cheese, divided", "1/4 c. sherry", "1/2 tsp. salt", "1/2 tsp. garlic powder", "1/2 tsp. black pepper", "1 (2 oz.) jar diced pimiento, drained", "1 (7 oz.) pkg. spaghetti, uncooked", "2 c. chopped, cooked chicken or turkey"]
["Melt margarine in a large saucepan over medium heat.", "Add mushrooms and onion and saute 7 minutes or until liquid evaporates.", "Stir in all-purpose flour.", "Gradually add chicken broth, skim milk and light process cheese.", "Bring to a boil and cook 5 minutes, stirring constantly.", "Remove from heat.", "Stir in 2 tablespoons Parmesan and next 5 ingredients.", "Set aside."]
["margarine", "mushrooms", "onion", "all-purpose", "salt", "milk", "light process cream cheese", "Parmesan cheese", "sherry", "salt", "garlic powder", "black pepper", "pimiento", "chicken"]