Preheat oven to 400 degrees.
In a small bowl, combine the butter and pesto until well blended.
Spread the butter of the halves of french bread.
Place the halves together and wrap in aluminum foil. Bake for in a 400ºF oven for 10 minutes.
Remove bread from oven. Separate halves and place on a baking sheet.
Sprinkle each half with ¾ cup shredded parmesan.
Turn oven to broil and broil bread until cheese is bubbly and melted.