Spinach Casserole
["4 (10 oz.) pkg. frozen chopped spinach, thawed", "1/4 c. butter or margarine", "1/2 onion, chopped", "2 Tbsp. all-purpose flour", "1 (12 oz.) can evaporated milk", "1 (6 oz.) roll jalapeno pepper cheese, grated*", "1/2 tsp. garlic salt", "1/2 tsp. celery salt", "1 tsp. worcestershire sauce", "2 c. crushed round buttery crackers (about 56)", "1/4 c. butter or margarine, melted"]
["*6 oz.", "Mexican cheese loaf may be substituted for jalapeno pepper cheese."]
["butter", "onion", "flour", "milk", "roll", "garlic salt", "celery salt", "worcestershire sauce", "buttery crackers", "butter"]