Pineapple Au Gratin
["2 cans pineapple chunks (use juice of one can only)", "2 c. grated sharp Cheddar cheese", "1/2 c. sugar (amount optional)", "6 Tbsp. flour", "30 Ritz crackers, crushed", "1/2 stick melted margarine or butter"]
["Mix together first 4 ingredients.", "Spread in 8 x 11-inch or 2-quart baking dish.", "Sprinkle crushed crackers over top.", "Spoon melted margarine over all.", "Bake in 350\u00b0 oven for 30 minutes. Serves 6 to 8."]
["pineapple", "Cheddar cheese", "sugar", "flour", "crackers", "margarine"]