This is the BEST onion dip recipe. Thanks to sweet Vidalia onions, flavorful mayonnaise and parmesan cheese, you'll have a crowd-pleasing appetizer on your hands.
Cut up enough onion to fill your baking dish (you'll need more if you're using a larger glass Pyrex dish).
Add mayonnaise and Parmesan cheese and mix everything together.
Sprinkle a little extra parm cheese on top.
Cover with foil and bake 30 minutes on 350.
Uncover and crumble Ritz Crackers on top to cover top then cook for another 15 minutes to just brown a little.
Serves with Ritz or tortilla chips.