White Anchovy and Crisp Pita Bread Salad

Name: White Anchovy and Crisp Pita Bread Salad
Ingredients: 12 marinated white anchovies, cut into 1-inch pieces; Two 6-inch pita breads, split into 4 rounds; 4 tablespoons unsalted butter, softened; 1 medium shallot, thinly sliced and separated into rings; 1 1/2 tablespoons white balsamic vinegar or balsamic vinegar; 1 tablespoon extra-virgin olive oil; 3/4 cup sour cream; 1 garlic clove, minced; Salt and freshly ground white pepper; 2 large Belgian endives, cored and sliced crosswise 1/2 inch thick