Vidalia Onion Dip
["2 c. chopped onion", "2 c. Swiss cheese, grated", "2 c. mayo", "1/2 c. Romano cheese", "1/2 c. Parmesan cheese"]
["Mix together in shallow pan.", "Bake at 350\u00b0 for 20 to 25 minutes, until golden brown.", "Serve with crackers."]
["onion", "Swiss cheese", "mayo", "Romano cheese", "Parmesan cheese"]