Tortilla Casserole
["1 1/2 c. onion, coarsely chopped", "4 cloves garlic", "1/2 c. white wine vinegar", "3/4 tsp. salt", "1/4 tsp. cloves, ground", "2 tsp. olive oil", "2 c. chopped fresh tomato", "1 Tbsp. sugar", "6 to 8 fresh or pickled jalapeno peppers, seeded", "1/2 tsp. dried oregano leaves", "8 (6-inch) corn tortillas", "1 lb. cubed cooked chicken", "4 oz. Monterey Jack cheese, grated"]
["In blender, process onion, peppers and garlic with 1/2 cup water until finely chopped.", "Scrape into a saucepan; add vinegar, sugar, salt, oregano and cloves and bring to a boil.", "Cover, reduce heat to low and simmer 10 minutes."]
["onion", "garlic", "white wine vinegar", "salt", "olive oil", "tomato", "sugar", "jalapeno peppers", "oregano", "corn tortillas", "chicken", "cheese"]