Heat the oven to 350 degrees. Slice the baguettes in 1/4 inch rounds, and place on a baking sheet. Toast the bread in the oven for 15-20 minutes, or until golden. Turn pan during baking or flip slices over if needed. Allow to cool.
Spread each crostini liberally with blue cheese, top with a layer of prosciutto and drizzle with the balsamic vinegar. Enjoy!
A fabulous passed appetizer or perfect on a platter too.