Preheat broiler. Mix mayonnaise., Parmesan and garlic in large bowl to blend.
Arrange bread cut side up on large cookie sheet. Butter bread. Broil
until crisp and lightly browned. Spread Parmesan mixture over cut sides of
bread. Broil till top is puffed and golden brown. Sprinkle with chopped
basil, Cut into wedges and serve.