Mexican Cheese Casserole Dip 2 cups shredded sharp cheddar cheese 2 cups shredded mozzarella cheese 1 small can chopped green chillies 1 small can sliced black olives 1 small sweet onion -- chopped 1/2 cup mayonnaise Put all ingredients into a large bowl and mix. Pour into a greased glass pan and bake at 350 for approx 20 min. or untill golden brown. I take this to parties with a bag of nachos. It is a great dip!