Creamy Onion Dip

This is a variation of my onion dip.

Ingredients:
4 med onions, sliced thin
(1) 8 oz. pkg cream cheese
1 cup grated Parmesan cheese
2 cups shredded Asiago cheese
1/4 cup mayo

Directions:
Preheat oven to 350.  Slice onions thin and put in a large mixing bowl.  In a food processor, mix cream cheese and mayo.  Add cheeses and mayo mixture to onions, mixing well.  I just use my hands so I can get every onion coated.  Bake in a 2 QT baking dish at 350 for 45 minutes or until golden brown.  Serve with butter crackers.