Puffed Chicken Sandwiches
["1 2/3 c. chopped, cooked chicken or turkey", "1/3 c. mayonnaise", "salt and pepper to taste", "1/2 c. minced celery", "1/4 c. cut onion tops", "1 1/2 Tbsp. lemon juice", "softened butter", "3/4 c. (3 oz.) shredded Cheddar cheese", "6 slices bread", "3 egg whites"]
["Combine first 6 ingredients in a small mixing bowl; mix well. Toast 1 side of bread lightly; butter untoasted side.", "Spread chicken mixture over butter.", "Beat egg whites until stiff peaks form.", "Fold in cheese.", "Spread over chicken mixture.", "Bake at 450\u00b0 for 10 minutes or until golden brown.", "Serve immediately.", "Yields 6 servings."]
["chicken", "mayonnaise", "salt", "celery", "onion tops", "lemon juice", "butter", "Cheddar cheese", "bread", "egg whites"]