Place the bread on a baking sheet. Rub 1 side of each bread slice with cut half of garlic. Discard the garlic. Broil 1 minute or until very lightly browned.
Sprinkle the cheese evenly over the bread. Broil 1 minute or until cheese melts.
Drape the prosciutto evenly over the bread slices. Sprinkle with freshly ground pepper.