Tuna Fish Casserole
["1 can tuna", "1 can cream of celery or mushroom soup", "1 Tbsp. chopped onion", "2 Tbsp. melted margarine", "1/2 c. chopped celery", "1/2 soup can water", "1 c. shredded Mozzarella cheese", "1 c. coarsely broken crackers"]
["Melt margarine and stir in 1/2 of the crackers.", "Add the other ingredients.", "Mix.", "Pour into a Pyrex or other glass dish; top with remaining 1/2 cup crackers.", "Bake, uncovered, for 15 minutes at 400\u00b0."]
["tuna", "cream of celery", "onion", "margarine", "celery", "water", "Mozzarella cheese", "crackers"]