Spinach Artichoke Dip

1 c. shredded mozzarella cheese
1 c. grated Parmesan cheese
1/2 c. mayonnaise
1 can artichoke hearts, drained and chopped
1/2 cup or 1 handful of spinach (frozen, then thawed with the water squeezed out)
Minced onions to taste

Mix all ingredients together. Bake in casserole at 350 degrees for 20-30 minutes or in a lightly buttered crockpot on high for about an hour.

1/2 cup sundried tomatoes are a good addition.