How to Make It
In a small bowl, combine the butter, Parmesan cheese and pepper until smooth. Spread 1/2 teaspoon of the Parmesan butter on each slice of bread. Arrange the slices on the baking sheet.
Preheat the oven to 400°. Bake the crostini for about 8 minutes, or until golden.
In a large bowl, whisk together the vinegar, olive oil and salt. Add the radicchio and endives and toss. Arrange the salad on 8 small plates, garnish with the crostini and serve.