Tuna Casserole
["1 can tuna, packed in water", "1 can mushroom soup", "1/2 can water or milk", "25 or 30 crackers (such as saltines or Ritz)"]
["Using fork, break up tuna and place half of it in bottom of medium-size casserole dish.", "Pour half of the soup over it and cover with half of crackers, which have been finely crushed. Repeat with rest of ingredients.", "Dot with margarine, if desired. Bake 30 minutes at 350\u00b0."]
["tuna", "mushroom soup", "water", "crackers"]