Chicken Enchilada Casserole
["1 Tbsp. olive oil or polyunsaturated vegetable oil", "1 (4 oz.) can chopped green chiles", "2 c. onion, chopped", "1 (28 oz.) can tomatoes, undrained and chopped", "1/8 tsp. garlic powder", "2 c. (8 oz.) part skim milk Mozzarella cheese, grated", "1/2 tsp. salt (optional)", "1/2 tsp. ground oregano", "3 c. cooked skinless chicken, chopped", "2 c. low-fat plain yogurt", "24 corn tortillas, torn into 1-inch strips", "fresh coriander (cilantro) or parsley for garnish"]
["Preheat oven to 350\u00b0.", "Heat oil in a nonstick skillet and saute the green chiles and onion over low heat for 2 minutes. Stir in tomatoes, garlic powder and oregano.", "Add salt if desired. Simmer uncovered about 30 minutes or until thick.", "Combine chicken and yogurt.", "Place in shallow 3-quart baking dish."]
["olive oil", "green chiles", "onion", "tomatoes", "garlic powder", "Mozzarella cheese", "salt", "ground oregano", "chicken", "low-fat plain yogurt", "corn tortillas", "fresh coriander"]