Preheat oven to 400 degrees. With a large, sharp knife, make ¼-inch slices down the length of each potato, cutting only 3/4 of the way through. In a small bowl, combine butter and olive oil. Place the potatoes in a medium mixing bowl and drizzle half of the the olive oil/butter mixture over the top of each potato, then toss to evenly coat. Place potatoes on a small baking sheet and sprinkle with salt and pepper. Bake for 50-60 minutes, or until potatoes are tender inside and caramelized and crisp on the outside. Drizzle with remaining butter/oil and sprinkle with parmesan, herbs and drizzle with balsamic glaze.