Spanish Chicken Casserole(Lower Fat)  
["2 c. cooked chopped chicken", "1 (8 oz.) can mushroom pieces", "1 (16 oz.) fat-free sour cream", "1/2 large onion, chopped", "1 (4 oz.) can chopped green chiles", "1 can sliced water chestnuts", "1 (14 oz.) can fat-free chicken broth", "16 corn tortillas", "2 c. nonfat Cheddar cheese", "1 Tbsp. cornstarch", "1 Tbsp. flour", "3 Tbsp. fat-free chicken broth"]
["Saute chopped onion in 3 tablespoons chicken broth over low heat.", "Add 14 ounces chicken broth and sour cream; continue to simmer.", "Add flour and cornstarch; mix with a wire beater to blend.", "Stir in water chestnuts, green chiles and mushrooms.", "Cut tortillas into fourths.", "Line a large casserole dish, sprayed with nonstick cooking spray, with part of the tortilla pieces.", "Fold chicken into sauce.", "Spoon chicken sauce over tortillas and sprinkle 1/2 of grated cheese on top.", "Repeat layers and top with cheese.", "Bake at 350\u00b0 for 40 to 45 minutes."]
["chicken", "mushroom pieces", "sour cream", "onion", "green chiles", "water chestnuts", "chicken broth", "corn tortillas", "Cheddar cheese", "cornstarch", "flour", "chicken broth"]