This recipe is from www.tasteofhome.com Mona Zignego - Hartford, Wisconsin.
In a bowl, combine mayonnaise, onion, Parmesan cheese and garlic salt; stir in Swiss cheese.
Spoon into a 1-qt. baking dish.
Bake, uncovered, at 325° for 40 minutes. Sprinkle with parsley if desired.
Serve with crackers.
Yield: 2 cups.
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