Cheese & Olive Bruschetta

1/2 cup mayonnaise (or salad dressing)
1 cup mozzarella cheese, grated
2 medium tomatoes, seeded,finely chopped
1/4 cup black olives, chopped
1/4 cup parmesan cheese (preferably freshly grated)
1 teaspoon oregano
1/4 teaspoon basil
1 teaspoon black pepper
1 baguette, fresh, about 2 1/2" round and 27" long
1/3 cup butter, softened

Mix the first 8 ingredients (this can be done the day ahead and
refrigerated). Cut the baguette into 1" slices. Butter one side. Arrange on
a cookie sheet, buttered side up. Divide the mixture among the slices and
spread. Bake in 350F oven for about 15 minutes and the cheese has melted.